Seneca Township, Illinois

Seneca Township
Township
Location in McHenry County
CountryUnited States
StateIllinois
CountyMcHenry
EstablishedNovember 6, 1849
Area
 • Total
35.96 sq mi (93.1 km2)
 • Land35.95 sq mi (93.1 km2)
 • Water0.01 sq mi (0.026 km2)  0.03%
Population
 (2020)
 • Total
2,893
 • Density81.9/sq mi (31.6/km2)
Time zoneUTC-6 (CST)
 • Summer (DST)UTC-5 (CDT)
FIPS code17-111-68653
Websitehttp://www.senecatownship.com/

Seneca Township is located in McHenry County, Illinois. As of the 2020 census, its population was 2,893 and it contained 1,102 housing units. It includes the census-designated place of Franklinville.