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Delaware County, colloquially referred to as Delco,[2] is a county located in the U.S. state of Pennsylvania. With a population of 562,960,[3] it is the fifth most populous county in Pennsylvania, and the third smallest in area. The county was created on September 26, 1789, from part of Chester County, and named for the Delaware River.

Delaware County, Pennsylvania
County of Pennsylvania
County of Delaware, Pennsylvania
A collage of notable places in Delaware County
Flag of Delaware County, Pennsylvania
Seal of Delaware County, Pennsylvania
Map of Pennsylvania highlighting Delaware County
Location within the U.S. state of Pennsylvania
Map of the United States highlighting Pennsylvania
Pennsylvania's location within the U.S.
FoundedSeptember 26, 1789
Named forDelaware River
Largest cityUpper Darby
 • Total191 sq mi (495 km2)
 • Land184 sq mi (477 km2)
 • Water6.8 sq mi (18 km2), 3.5%
Population (est.)
 • (2018)564,751
 • Density3,065/sq mi (1,183/km2)
Congressional district5th
DesignatedOctober 3, 1982[1]
Interactive map of Delaware County, Pennsylvania

Its county seat is Media.[4] Until 1850, Chester was the county seat of Delaware County and, before that, of Chester County.

Delaware County is adjacent to the city-county of Philadelphia and is included in the PhiladelphiaCamdenWilmington, PA–NJDEMD Metropolitan Statistical Area. Delaware County is the only county covered in its entirety by area codes 610 and 484.



Map of the early settlements of Delaware County, Penna
The old Chester Courthouse, built in 1724.

Delaware County lies in the river and bay drainage area named "Delaware" in honor of Thomas West, 3rd Baron De La Warr, Governor of the nearby English colony of Virginia. The land was explored by Henry Hudson in 1609, and over the next several decades it was variously claimed and settled by the Swedes, the Dutch, and the English. Its original human inhabitants were the Lenni-Lenape tribe of American Indians.

Once the Dutch were defeated and the extent of New York was determined, King Charles II of England made his grant to William Penn in order to found the colony which came to be named Pennsylvania. Penn divided his colony into three counties: Bucks, Philadelphia, and Chester. The riverfront land south of Philadelphia, being the most accessible, was quickly granted and settled. In 1789, the southeastern portion of Chester County was divided from the rest and named Delaware County for the Delaware River.


According to the U.S. Census Bureau, the county has a total area of 191 square miles (490 km2), of which 184 square miles (480 km2) is land and 6.8 square miles (18 km2) (3.5%) is water.[5] It is the third-smallest county in Pennsylvania by area.

Delaware County is roughly diamond- or kite-shaped, with the four sides formed by the Chester County boundary to the northwest, the boundary with the state of Delaware (a portion of the "Twelve Mile Circle") to the southwest, the Delaware River (forming the border with the state of New Jersey to the southeast, and the city of Philadelphia and Montgomery County to the east and northeast.

The lowest point in the state of Pennsylvania is located on the Delaware River in Marcus Hook in Delaware County, where it flows out of Pennsylvania and into Delaware. The highest point in Delaware County is 500 feet at two points southeast of Wyola in Newtown Township [1].

Newlin Mill, built 1704, on the west branch of Chester Creek, near Concordville.

Waterways in Delaware County generally flow in a southward direction and ultimately drain into the Delaware River. The waterways are, from west to east: the Brandywine River (forming a portion of the county's western boundary with Chester County), Naaman's Creek, Stoney Creek, Chester Creek, Ridley Creek, Crum Creek, Muckinipates Creek, Darby Creek and Cobbs Creek (forming a portion of the county's eastern boundary with Philadelphia). Crum Creek was dammed in 1931 near Pennsylvania Route 252 to fill Springton Lake (also known as Geist Reservoir), an approximately 391-acre (1.58 km2)[6] drinking water reservoir maintained by Aqua America, the county's largest lake.

The Trainer Refinery and the Port of Chester are located along the shores of the Delaware River.

Adjacent countiesEdit

Delaware County is one of four counties in the United States to border a state with which it shares the same name (the other three are Nevada County, California, Texas County, Oklahoma, and Ohio County, West Virginia).

National protected areaEdit

John Heinz National Wildlife Refuge

State protected areaEdit

2,600 acres (11 km2) of the county are occupied by the Ridley Creek State Park.

Climate and weatherEdit

Delaware County is divided by the boundary between the humid subtropical (Cfa) and the hot-summer humid continental climate (Dfa). The hardiness zones are 7a and 7b.

Media, Pennsylvania
Climate chart (explanation)
Average max. and min. temperatures in °F
Precipitation totals in inches
Source: The Weather Channel[7]


Census Pop.
Est. 2018564,751[8]1.0%
U.S. Decennial Census[9]
1790-1960[10] 1900-1990[11]
1990-2000[12] 2010-2017[3]

As of the 2010 census, the county was 71.1% White non-Hispanic, 19.7% Black or African American, 0.2% Native American or Alaskan Native, 4.7% Asian, 0.0% Native Hawaiian, 2.0% were two or more races, and 0.9% were some other race. 3.0% of the population were of Hispanic or Latino ancestry.

As of the 2000 census, there were 550,864 people, 206,320 households, and 139,472 families residing in the county. The population density was 2,990 people per square mile (1,155/km²). There were 216,978 housing units at an average density of 1,178 per square mile (455/km²). The racial makeup of the county was 80.32% White, 14.52% African American, 0.11% Native American, 3.29% Asian, 0.02% Pacific Islander, 0.56% from other races, and 1.19% from two or more races. 1.52% of the population were Hispanic or Latino of any race. 24.6% were of Irish, 17.5% Italian, 10.1% German and 6.7% English ancestry.

There were 206,320 households out of which 31.50% had children under the age of 18 living with them, 50.80% were married couples living together, 12.90% had a female householder with no husband present, and 32.40% were non-families. 27.60% of all households were made up of individuals and 11.60% had someone living alone who was 65 years of age or older. The average household size was 2.56 and the average family size was 3.17.

In the county, the population was spread out with 24.80% under the age of 18, 8.90% from 18 to 24, 28.80% from 25 to 44, 21.90% from 45 to 64, and 15.60% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 91.20 males. For every 100 females age 18 and over, there were 86.90 males.

The median income for a household in the county was $50,092, and the median income for a family was $61,590. Males had a median income of $44,155 versus $31,831 for females. The per capita income for the county was $25,040. About 5.80% of families and 8.00% of the population were below the poverty line, including 10.00% of those under age 18 and 7.10% of those age 65 or over.


Map of Delaware County, Pennsylvania with Municipal Labels showing Cities and Boroughs (red), Townships (white), and Census-designated places (blue).

Under Pennsylvania law, there are four types of incorporated municipalities: cities, boroughs, townships, and exactly one town. There are 49 municipalities in Delaware County:




Census-designated placesEdit

Census-designated places are geographical areas designated by the U.S. Census Bureau for the purposes of compiling demographic data. They are not actual jurisdictions under Pennsylvania law. Other unincorporated communities, such as villages, may be listed here as well.

Unincorporated communitiesEdit

Population rankingEdit

The population ranking of the following table is based on the 2010 census of Delaware County.[13]

county seat

Rank City/Town/etc. Municipal type Population (2010 Census)
1 Upper Darby Township 82,795
2 Haverford Township 48,491
3 Chester City 33,972
4 Radnor Township 31,531
5 Drexel Hill CDP 28,043
6 Springfield Township 24,211
7 Ardmore (partially in Montgomery County) CDP 12,455
8 Yeadon Borough 11,443
9 Broomall CDP 10,789
10 Darby Borough 10,687
11 Lansdowne Borough 10,620
12 Woodlyn CDP 9,485
13 Collingdale Borough 8,786
14 Folsom CDP 8,323
15 Brookhaven Borough 8,006
16 Village Green-Green Ridge CDP 7,822
17 Glenolden Borough 7,153
18 Ridley Park Borough 7,002
19 Clifton Heights Borough 6,652
20 Folcroft Borough 6,606
21 Prospect Park Borough 6,454
22 Swarthmore Borough 6,194
23 Norwood Borough 5,890
24 Sharon Hill Borough 5,697
25 Media Borough 5,327
26 Boothwyn CDP 4,933
27 Aldan Borough 4,152
28 Linwood CDP 3,281
29 Upland Borough 3,239
30 Lima CDP 2,735
31 Morton Borough 2,669
32 East Lansdowne Borough 2,668
33 Colwyn Borough 2,546
34 Chester Heights Borough 2,531
35 Eddystone Borough 2,410
36 Marcus Hook Borough 2,397
37 Parkside Borough 2,328
38 Trainer Borough 1,828
39 Haverford College (partially in Montgomery County) CDP 1,331
40 Millbourne Borough 1,159
41 Cheyney University (mostly in Chester County) CDP 988
42 Rose Valley Borough 913
43 Rutledge Borough 784

Politics and governmentEdit

Presidential elections results
Presidential elections results[14]
Year Republican Democratic Third parties
2016 37.0% 110,667 59.3% 177,402 3.8% 11,267
2012 38.8% 110,853 60.2% 171,792 1.0% 2,919
2008 38.8% 115,273 60.1% 178,870 1.1% 3,367
2004 42.3% 120,425 57.2% 162,601 0.5% 1,512
2000 42.7% 105,836 54.4% 134,861 3.0% 7,380
1996 39.5% 92,628 49.4% 115,946 11.2% 26,174
1992 40.8% 108,587 41.8% 111,210 17.4% 46,277
1988 60.0% 147,656 39.0% 96,144 1.0% 2,505
1984 61.8% 161,754 37.5% 98,207 0.7% 1,821
1980 55.8% 143,282 34.4% 88,314 9.8% 25,263
1976 54.9% 148,679 43.3% 117,252 1.8% 4,963
1972 63.9% 175,414 34.3% 94,144 1.8% 4,893
1968 50.2% 133,777 40.1% 106,695 9.7% 25,964
1964 42.9% 111,189 56.8% 147,189 0.3% 717
1960 52.0% 135,672 47.8% 124,629 0.2% 482
1956 63.5% 143,663 36.3% 82,024 0.2% 523
1952 61.6% 129,743 38.1% 80,316 0.3% 689
1948 60.9% 93,412 37.3% 57,156 1.8% 2,747
1944 54.8% 78,533 44.7% 64,021 0.5% 755
1940 56.9% 80,158 42.7% 60,225 0.4% 549
1936 52.4% 74,899 45.5% 65,117 2.1% 2,997
1932 68.2% 75,291 29.4% 32,413 2.5% 2,705
1928 73.6% 83,092 26.0% 29,378 0.4% 471
1924 81.8% 41,998 12.4% 6,368 5.8% 2,979
1920 75.3% 34,126 21.2% 9,602 3.5% 1,565
1916 66.0% 16,315 31.3% 7,742 2.7% 677
1912 36.2% 8,418 25.8% 6,001 38.0% 8,819[a]
1908 70.8% 15,184 26.7% 5,727 2.6% 550
1904 78.2% 15,032 18.6% 3,586 3.2% 618
1900 75.0% 13,794 23.1% 4,249 2.0% 358
1896 75.3% 13,979 22.5% 4,169 2.3% 424
1892 60.7% 9,272 36.2% 5,520 3.1% 477
1888 62.0% 8,791 35.5% 5,028 2.5% 351

It has operated under a home-rule charter with five at-large councilmembers since 1972. Republicans remain in control of many county council seats and row offices, despite the larger number of registered Democrats in the county. In the 2017 municipal election, Delaware County elected the first Democratic Council members and row officers since home-rule began. They took office in January 2018.

As of June 2017, there were 391,683 registered voters in Delaware County.[13]

  • Democratic: 178,788 (45.65%)
  • Republican: 164,106 (41.88%)
  • No Affiliation: 25,892 (6.61%)
  • Other Parties: 22,897 (5.85%)

Until recent years, Delaware County was regarded as a strongly Republican county. The Delaware County Republican party political machine was controlled by William McClure and his son John J. McClure from 1875 to 1965.[15] Delaware County voted for the Republican candidate in nearly every election from 1854 through 1988, with exceptions including the 1964 presidential election. In recent elections, however, Delaware County has voted for Democratic candidates in every presidential election since 1992, including voting for Bill Clinton in 1992 and 1996, Al Gore in 2000, John Kerry in 2004, Barack Obama in 2008 and 2012, and Hillary Clinton in 2016.

Delaware County has been trending Democratic, and the longstanding Republican registration edge has been erased. The Democrats now have over twice as many voters in the county as they had in 2002. It narrowly voted for Bill Clinton in 1992, but has gone Democratic in every Presidential election since then by 10 points or more by progressively-increasing margins. In the 2004 election Democratic presidential candidate John Kerry won the county by 14 points. In the 2008 presidential election, Democratic Senator Barack Obama defeated Republican Senator John McCain resoundingly, by over 21 points.

At the state and local level, however, Republicans still remain competitive with Democrats. Most Republicans from the county tend to be fiscally conservative and socially moderate, as is the case with Republicans from most suburban Philadelphia counties. In the 2004 US Senate election, Republican Arlen Specter defeated Joe Hoeffel but Democrat Bob Casey, Jr. defeated Rick Santorum in the 2006 Senate election. All three Democratic state row office candidates carried it in 2008. The Democrats presently hold all but one row office, though the Republicans currently have a majority on the county commission.

In 2016, Delaware County elected all Democrats in national office elections except Republican Patrick Meehan (U.S. Representative).[16]

All of Delaware County is located in the state's 5th congressional district, represented by Democrat Mary Gay Scanlon. Prior to 2019, most of Delaware County had been in the 7th congressional district. The district had been held for 20 years by Republican Curt Weldon until he was ousted by Joe Sestak, a retired admiral, in the 2006 U.S. House of Representatives election. Also in the 2006 election, Democrat Bryan Lentz unseated Republican incumbent State Representative Tom Gannon in the 161st House district. In 2010 Sestak ran for the senate seat vacated by Arlen Specter and was replaced by Republican Pat Meehan, who defeated Lentz, the Democratic candidate. Lentz was replaced in the State House by Joe Hackett, a Republican. Meehan represented the 7th district until his resignation on April 27, 2018.[17] Before it was thrown out by a Pennsylvania Supreme Court decision in 2018, the 7th Congressional District had been regarded one of the most irregularly drawn districts in the nation.[18]

Delaware County Council[19]Edit

Office Holder Party
County Councilman (chairman) John P. McBlain Republican
County Councilwoman (vice-chair) Colleen P. Morrone Republican
County Councilman Michael F. Culp Republican
County Councilman Kevin M. Madden Democratic
County Councilman Brian P. Zidek Democratic

County Row OfficersEdit

Office Holder Party
Controller Joanne Phillips, Esquire Democratic
District Attorney Katayoun Copeland Republican
Register of Wills Mary J. Walk, Esquire Democratic
Sheriff Jerry Sanders Democratic

United States SenateEdit

Senator Party
Pat Toomey Republican
Bob Casey Democratic

United States House of RepresentativesEdit

The 2018 congressional map ordered by the Supreme Court of Pennsylvania places all of Delaware County within the new 5th congressional district.
District Representative Party
5 Mary Gay Scanlon Democratic

State SenateEdit

District Representative Party
8 Anthony Hardy Williams Democratic
9 Tom Killion Republican
17 Daylin Leach Democratic
26 Tim Kearney Democratic

State House of RepresentativesEdit

District Representative Party
159 Brian Joseph Kirkland Democratic
160 Stephen Barrar Republican
161 Leanne Krueger-Braneky Democratic
162 Dave Delloso Democratic
163 Mike Zabel Democratic
164 Margo Davidson Democratic
165 Jennifer O’Mara Democratic
166 Greg Vitali Democratic
168 Chris Quinn Republican
185 Maria Donatucci Democratic
191 Joanna McClinton Democratic


The George W. Hill Correctional Facility (Delaware County Prison) is located in Thornbury Township.[20][21] The jail houses pre-trial inmates and convicted persons who serve county sentences of two years less one day.[21] It is operated by the for-profit prison corporation GEO Group, of Boca Raton, Florida.


Map of Delaware County, Pennsylvania School Districts

Public school districtsEdit

Charter schoolsEdit

In Pennsylvania, charter schools are public schools. They receive a per pupil funding from the state along with federal funding. They are eligible to apply for many competitive grants offered by the state and federal governments. There are two charter schools in 2011. They are located within the attendance borders of the Chester Upland School District. Charter schools may accept students from neighboring school districts.

Private schoolsEdit

From EDNA, Educational Entity Search Results, 2011

  • Academy of Notre Dame, Villanova
  • Agnes Irwin School, Rosemont
  • Annunciation BVM School, Havertown
  • Archbishop John Carroll HS, Radnor
  • Archbishop Ryan School Deaf and Hard of Hearing Children
  • Aston Presbyterian DC Learning Center, Aston
  • Blessed Virgin Mary School, Darby
  • Cardinal O'Hara High School, Springfield
  • Center for Self Development, Chester
  • Cheder Chabad Philadelphia, Broomall
  • Christ Haven Christian Academy, Darby
  • Christ Memorial Classical Academy, Collingdale
  • Christian Academy, Brookhaven
  • Country Day Sacred Heart, Bryn Mawr
  • Creative Minds Christian Academy, Darby
  • Davidson School, Elwyn (State Approved Private School )
  • Delaware County Christian School, Newtown Square
  • Drexel Neumann Academy, Chester
  • Easter Seals of Southeastern Pa, Media (State Approved Private School)
  • Episcopal Academy, Newtown Square
  • Faith Temple Christian School, Chester
  • Frederick Douglass Christian School, Chester
  • Friends School Haverford
  • George Crothers Memorial School, Swarthmore (State Approved Private School)
  • Haven Kindergarten Academy, Chester
  • Holy Child Academy, Drexel Hill
  • Holy Cross School, Springfield
  • Holy Saviour – St John Fisher, Linwood
  • Huntington Learning Center, Springfield
  • Institute of Islamic Studies, Chester
  • Jack M. Barrack Hebrew Academy, Bryn Mawr
  • KEEP Kindergarten, Havertown
  • Lane Good Council Montessori School, Broomall
  • Lansdowne Friends School, Lansdowne
  • Media Providence Friends School, Media
  • Monsignor Bonner Archbishop, Drexel Hill
  • Mother of Providence Regional Catholic School
  • Melmark Inc, Berwyn (State Approved Private School)
  • Neumann College Child Dev Center, Aston
  • New Beginnings Academy, Chester
  • Notre Dame Delourdes School, Swarthmore
  • Our Lady of Fatima School, Secane
  • Our Lady of Perpetual Help, Morton
  • Robinson Christian Academy, Middletown
  • Rose Tree Day School, Media
  • Sacred Heart School, Havertown
  • School in Rose Valley, Rose Valley
  • Shiloh Development Academy, Chester
  • St. Aloysius Academy, Bryn Mawr
  • St. Anastasia School, Newtown Square
  • St. Andrew School, Drexel HIll
  • St. Bernadette School, Drexel HIll
  • St. Cornelius School, Chadds Ford
  • St. Cyril Alexandria School, EaSt. Lansdowne
  • St. Denis School (Now called Cardinal Foley School), Havertown
  • St. Dorothy School, Drexel Hill
  • St. Eugene School, Primos
  • St. Francis Desales Parochial, Aston
  • St. Francis of Assisi School, Springfield
  • St. James Regional Catholic School, Ridley Park
  • St. Joseph School, Aston
  • St. Katharine of Siena, Wayne
  • St. Laurence School, Upper Darby
  • St. Mary Magdelen School, Media
  • St. Pius X School, Broomall
  • St. Thomas Apostle School, Glen Mills
  • Sterling East – Philadelphia Campus, Folcroft
  • Stratford Friends School, Newtown Square
  • Valley Forge Military Academy, Wayne
  • Walden School, Media

Colleges and universitiesEdit

Library at Cheyney University
Benjamin West Birthplace on the campus of Swarthmore College
Old Main at Widener University

Adult educationEdit

  • Haverford Adult School[22]
  • Main Line School Night[23]
  • Senior Community Services Lifelong Learning[24]


  • Aston Free Library
  • Collingdale Public Library
  • Darby Free Library
  • Delaware County Francis J. Catania Law Library
  • Delaware County Library System (government agency)[25]
  • Folcroft Public Library
  • Glenolden Library
  • Helen Kate Furness Library (Wallingford)
  • Haverford Township Free Library
  • J. Lewis Crozer Library (Chester)
  • Lansdowne Public Library
  • Marple Public Library
  • Mary M. Campbell Library (Marcus Hook)
  • Media-Upper Providence Free Library
  • Middletown Free Library
  • Newtown Square Public Library
  • Norwood Public Library
  • Prospect Park Public Library
  • Memorial Library of Radnor Township
  • Rachel Kohl Community Library (Glen Mills)
  • Ridley Park Public Library
  • Ridley Township Public Library
  • Sharon Hill Public Library
  • Springfield Township Library
  • Swarthmore Public Library
  • Tinicum Memorial Public Library
  • Upper Darby & Sellers Memorial Library (main)
  • Upper Darby Library-Municipal Branch
  • Upper Darby Library-Primos Branch
  • Yeadon Public Library


Delaware County is bisected north to south by Blue Route Interstate 476, which connects I-76 just north of the extreme northern corner of the county to I-95, which parallels the Delaware River along the southeastern edge of the county.

Delaware County is home to SEPTA's 69th Street Terminal in Upper Darby, and is served by the Norristown High Speed Line (P&W), two Red Arrow trolley lines (Routes 101 and 102), four Regional Rail Lines (the Airport Line, Wilmington/Newark Line, Media/Elwyn Line, and Paoli/Thorndale Line), and a host of bus routes.

The western portion of Philadelphia International Airport is located in Delaware County, and the county hosts some airport-related commerce such as Philadelphia's UPS terminal and airport hotels.

Major highwaysEdit



Dam on Ridley Creek in Ridley Creek State Park
Old Rose Tree Tavern in Rose Tree Park.

There is one Pennsylvania state park in Delaware County.

County parks include:


Harrah's Philadelphia Casino & Racetrack is a harness racing track and casino (i.e., "racino") located on the Chester, Pennsylvania waterfront. It is owned by Vici Properties and operated by Caesars Entertainment.


The city of Chester is home to the Philadelphia Union of Major League Soccer. The team plays at Talen Energy Stadium, a venue located at the base of the Commodore Barry Bridge.

Delaware County is the traditional home of women's professional soccer in the Philadelphia area. The former Philadelphia Charge of the defunct Women's United Soccer Association played at Villanova Stadium, which is located on the campus of Villanova University. The Philadelphia Independence of Women's Professional Soccer succeeded the Charge and played at Widener University's Leslie Quick Stadium in 2011.

Delaware County is the home of one of oldest baseball leagues in the country, the Delco League, which at one time was known for featuring future, former, and even current major league players who were offered more money than their current teams would pay them.[26][27][28]

Every summer, Delaware County is home to the Delco Pro-Am, a basketball league consisting of current, future, and former NBA players as well as local standout players.[29]

Delaware County is also the former home of a rugby league team called the Aston Bulls, a member of the American National Rugby League.


The county itself is serviced by several newspapers, most notably the News of Delaware County, the Delaware County Daily Times, The Suburban and Wayne Times, and The Spirit, the only minority owned newspaper serving Delaware County.[citation needed] The Philadelphia Inquirer also has a significant presence, reflecting Philadelphia's influence on Delaware County and the rest of the metro. Delaware County Magazine is the news magazine with the largest circulation in Delaware County, reaching over 186,000 homes.

See alsoEdit


  1. ^ The leading “other” candidate, Progressive Theodore Roosevelt, received 8,272 votes, while Socialist candidate Eugene Debs received 374 votes, Prohibition candidate Eugene Chafin received 170 votes, and Socialist Labor candidate Arthur Reimer received 3 votes.


  1. ^ "PHMC Historical Markers Search" (Searchable database). Commonwealth of Pennsylvania. Pennsylvania Historical and Museum Commission. Retrieved February 11, 2015.
  2. ^ "Delco Sheriff: Don't fall for jury duty scam". Delco Times. Retrieved July 1, 2014.; McCrystal, Laura (June 27, 2014). "Voting Wards To Be Changed in Delco's Radnor Township". Retrieved July 1, 2014.; McCrystal, Laura (June 30, 2014). "Roadwork in Delco to affect I-95 and I-476 this week". Retrieved July 1, 2014.; DaGrassa, Peg (June 27, 2014). "Here's the Scoop on Ross, Fresh Stop, KFC and Other Delco Businesses". Delco News Network. Retrieved July 1, 2014.; Kurtz, Paul (June 27, 2014). "Delco Homeless Families Get A Day of Escapist Fun". CBS Philly. Retrieved July 1, 2014.;"Delco's bars, taverns are really heating up". Delco Times. June 16, 2014. Retrieved July 1, 2014.
  3. ^ a b "State & County QuickFacts" (PDF). Delaware County. Retrieved February 7, 2017.
  4. ^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
  5. ^ "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Retrieved March 6, 2015.
  6. ^ "Crum". Chester - Ridley - Crum Watersheds Association. Archived from the original on October 16, 2008.
  7. ^ "Monthly Averages for Media, Pennsylvania". The Weather Channel. Retrieved February 15, 2011.
  8. ^ "Population and Housing Unit Estimates". Retrieved October 9, 2018.
  9. ^ "U.S. Decennial Census". United States Census Bureau. Retrieved May 31, 2017.
  10. ^ "Historical Census Browser". University of Virginia Library. Retrieved May 31, 2017.
  11. ^ "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved May 31, 2017.
  12. ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Retrieved May 31, 2017.
  13. ^ "2010 Census". United States Census. Archived from the original on December 6, 2013. Retrieved February 10, 2013.
  14. ^ Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". Retrieved November 25, 2018.
  15. ^ McLarnon, John Morrison (2003). Ruling Suburbia: John J. McClure and the Republican Machine in Delaware County. Newark, Delaware: University of Delaware Press. p. 11. ISBN 0-87413-814-0. Retrieved June 28, 2018.
  16. ^ "Pennsylvania Elections - County Results". Retrieved November 25, 2016.
  17. ^ Tamari, Jonathan (April 27, 2018). "Rep. Pat Meehan resigns; will pay back $39,000 used for harassment settlement". Philadelphia Inquirer. Retrieved April 27, 2018.
  18. ^ Ingraham, Christopher. "This is the best explanation of gerrymandering you will ever see". Washington Post. Retrieved March 2, 2015.
  19. ^ "Elected Officials - Delaware County, Pennsylvania".
  20. ^ "Chapter 7 7-11 Archived March 20, 2012, at the Wayback Machine." Comprehensive Zoning Plan. Thornbury Township. Retrieved on September 6, 2011. "The three major institutions found in the Township, the Delaware County Prison, Glen Mills Schools and Cheyney University[...]"
  21. ^ a b "Delaware County Prison Archived September 2, 2011, at the Wayback Machine." Delaware County, Pennsylvania. Retrieved on September 6, 2011. "George W. Hill Correctional Facility (Delaware County Prison), which is located on 500 Cheyney Road in Thornbury Township[...]"
  22. ^ "Haverford Township Adult School". Haverford Township Adult School.
  23. ^ "MainLine School Night -".
  24. ^ "Archived copy". Archived from the original on March 25, 2010. Retrieved March 26, 2010.CS1 maint: Archived copy as title (link)
  25. ^ "Delaware County Library System -".
  26. ^ "Delco League". Archived from the original on October 12, 2014. Retrieved October 8, 2014.
  27. ^ "Delco League to honor legends of ballfields from 105 seasons". Delco Times. Retrieved October 8, 2014.
  28. ^ "COLTS BOLT BOROUGH: Collingdale's Delco Baseball League team is the latest loss endured by tiny town". Delco Times. Retrieved October 8, 2014.
  29. ^ "Plenty of talent as Delco Pro-Am League tips off". Delco Times. Retrieved October 8, 2014.

Further readingEdit

External linksEdit

Coordinates: 39°55′N 75°24′W / 39.92°N 75.40°W / 39.92; -75.40