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Pomonkey is named for the Pamunkey tribe of Native Americans that lived in the area. The Brent family owned much of the land from before the American Revolutionary War, asserting their claims after Giles Brent married princess Mary Kittamaquund in the 17th century. Robert Brent (1764-1819) became the first mayor of Washington, D.C. (and freed his slaves in his will).
In the early 19th century, the village of Bumpy Oak was renamed Pomonkey when it was designated a postal stop. Another Robert Brent (1759-1810) and Dorothy Leigh Brent built a plantation house in this area, which they called Brentfield (which later burned down). Their children included Maryland judge George Brent (1817-1881) and Louisiana's U.S. Representative William Leigh Brent (1784-1848), one of whose sons became Maryland Attorney General Robert James Brent and another Confederate General Joseph Lancaster Brent.
The former Pomonkey High School was one of two black segregated high schools in Charles County until the 1960s, and has a proud alumni association. From 1946 to 1970 the "Pomonkey Spoon Factory" manufactured wooden tools and small items.
For several years, Maryland Airport has planned a 1,300 ft (400 m) expansion, including an energetics (explosives) technical center and business park employing over 3,000 people. However, environmental concerns related to stormwater discharge into Mattawoman Creek delayed those plans. The Naval Research Laboratory has its Free Space Antenna Range on Bumpy Oak Road.
Pomonkey itself is an unincorporated area and not part of a Census Designated Place, so few statistics for Pomonnkey are available. Bryans Road, Maryland is the nearest community to Pomonkey for which data are available. However, the area lies at the meeting of ZIP codes 20616 (Bryans Road), 20640 (Indian Head) and 20646 (La Plata). As of 2000, Election District 7 (named for Pomonkey, but which includes Bryans Road and Indian Head) had a population of 11,859 persons. The racial breakdown was: 59.0% white, 35.8% black, 1.5% American Indian and Alaskan Native, 1.2% Asian, 0.1% Asian Indian, 0.2% Chinese, 0.6% Filipino, <0.1% Japanese, 0.1% Korean, <0.1% Vietnamese, 0.1% Other Asian, 0.1% Native Hawaiian and other Pacific Islander, 0.5% Other race, 1.8% two or more races.
- "Bryans Road Indian Head Sub-Area Plan". Charles County, Maryland — Department Of Planning & Growth Management. Retrieved 2007-10-14. Page 19.
- "Pomonkey Map". Absolute United States. Retrieved 2008-02-19.
- "Routes 220-239". MDRoads. Retrieved 2008-02-19. Contrast with the Pomonkey Map, and see that the note for Route 227 refers to Marshall Hall road, which differs from Marshall Corner road.
- U.S. Geological Survey Geographic Names Information System: Pomonkey, Maryland
- Richardson, Hester (1913). Side-lights on Maryland history, with sketches of early Maryland families. Baltimore, Williams and Wilkins company. Retrieved 3 February 2020.
- Bryans Road, Appendix B Appendix B Brief History of Bryans Road
- "Archives of Maryland (Biographical Series) Robert J. Brent (1811-1872)". Maryland State Archives. Retrieved 3 February 2020.
- David M. French, The Brent Family; the Carroll Families of Colonial Maryland (Alexandria, Virginia typescript copyright 1981) pp. 85-87
- Chilton, W.B. "The Brent Family (Continued)". The Virginia Magazine of History and Biography. 21 (1): 96–97. Retrieved 3 February 2020.
- Partlow, Joshua; Paley, Amit R. (February 17, 2005). Area's Black Schoolhouses Still Have a Lesson to Teach. The Washington Post. Retrieved 2007-12-23.
As noted here, the other school was Bel Alton.
- "Portraits of America: Charles County", page 55 of volume 2, published 2009.
- Maryland Independent newspaper, October 30, 2009, page A-8.
- Fact Book. Naval Research Laboratory. 1985. Retrieved 3 February 2020.
- "20616 Zip Code (Bryans Road, Maryland) Detailed Profile". City-data.com. Retrieved 2008-01-04.
- "Charles County, Maryland 2002 Zip Code Areas" (PDF). Maryland State Data Center. Retrieved 2008-01-04.
- AirNav Information
- Pomonkey, Maryland, United States
- Describes former NRL installation
- Pomonkey Launch and Control (MD-217/218, W-54)
- "Bryans Road Indian Head Sub-Area Plan". Department Of Planning & Growth Management, Charles County, Maryland. Retrieved 2007-12-22.
- Dents Level Cemetery
- Philip Rucker (July 22, 2007). "After a Long Wait, Charles Airport to Expand". The Washington Post. Retrieved 2007-12-22.
- "Inside Our School World, Sports: African Americans During a Century of Segregation, Charles County, Maryland". College of Southern Maryland. 2007-07-20. Retrieved 2007-12-22.