St. John Township, Lake County, Indiana

St. John Township is one of eleven townships in Lake County, Indiana. As of the 2010 census, its population was 66,741 and it contained 25,691 housing units.[3]

St. John Township
Map highlighting St. John Township, Lake County, Indiana.svg
Coordinates: 41°28′36″N 87°27′45″W / 41.47667°N 87.46250°W / 41.47667; -87.46250Coordinates: 41°28′36″N 87°27′45″W / 41.47667°N 87.46250°W / 41.47667; -87.46250
CountryUnited States
 • TypeIndiana township
 • Total39.37 sq mi (102.0 km2)
 • Land39.2 sq mi (102 km2)
 • Water0.17 sq mi (0.4 km2)
Elevation679 ft (207 m)
 • Total66,741
 • Density1,702.6/sq mi (657.4/km2)
FIPS code18-66870[2]
GNIS feature ID453819


St. John Township was established in 1848. It was named for John Hack, the first German settler.[4]


According to the 2010 census, the township has a total area of 39.37 square miles (102.0 km2), of which 39.2 square miles (102 km2) (or 99.57%) is land and 0.17 square miles (0.44 km2) (or 0.43%) is water.[3]

The township includes the towns of Dyer, Schererville and St. John as well as the unincorporated areas of these towns.[5]

Zip codes in the township include 46307, 46311, 46319, 46373, and 46375. The State House districts are IN-11 and IN-15, and the State Senate districts are IN-1, IN-6, and a small portion of IN-2.[6]


The racial makeup of the township is 82.1% non-Hispanic White, 11.3% Hispanic, 2.73% African American, 2.23% Asian, 0.58% from other races, and 1.13% from two or more races. The percentages of Hispanic and African American residents are, respectively, 5.4 and 22.6 percent lower than Lake County as a whole.

Native-born citizens make up 91.9% of the population. Naturalized citizens are 5.3% of the population, while 1.9% are not citizens. The top ten countries of birth for foreign-born residents are Mexico, India, Croatia, Poland, Serbia, Greece, Macedonia, Philippines, Germany, and Bosnia and Herzegovina. The most common self-reported ancestries are: German (23.1%), Polish (17%), Irish (15.9%), Mexican (8.72%), Unclassified/Unreported (8.5%), Italian (8.1%), English (7.3%), Dutch (5.6%), American (4.7%), and Serbian (2.8%).[6]


  1. ^ "US Board on Geographic Names". United States Geological Survey. 2007-10-25. Retrieved 2008-01-31.
  2. ^ "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
  3. ^ a b "Population, Housing Units, Area, and Density: 2010 - County -- County Subdivision and Place -- 2010 Census Summary File 1". United States Census. Retrieved 2013-05-10.
  4. ^ Howat, William Frederick (1915). A Standard History of Lake County, Indiana, and the Calumet Region, Volume 1. Lewis Publishing Company. p. 105.
  5. ^ "St. John Township Trustee". St. John Township Trustee. Retrieved 2 May 2015.
  6. ^ a b "Overview of the St. John Township, Lake County, Indiana (Township) - Statistical Atlas". Retrieved 2017-02-02.

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