Oswego Township occupies a 6 mile square plus additional land to the south of the Fox River in the northeast corner of Kendall County, Illinois. It was established in 1849. It is located at 41.693N. – 88.335 W. and consists of 39.9 square miles of which 0.7 square miles is covered by water. The lands of the Township are drained by the Fox River and its subsidiaries.
Oswego Township’s population in the 2011 census was 50,870 and it contains 16,388 housing units and 20,326 parcels of land.
State Highways running through Oswego Township include U.S.Route 34, IL Route 25, IL Route 31, U.S.Route 30 and IL Route 71.
Oswego Township includes the largest unincorporated community, Boulder Hill, In Illinois. It had a population in 2011 of 8,108 and consisted of 2,848 households. Oswego Township was named after the Village of Oswego which, in turn, was named after a city in New York. Oswego is an Iroquois Native American word meaning place of the flowing out or mouth of the stream. Oswego, New York sits at the mouth of the Oswego River while Oswego, Illinois sits at the mouth of Waubonsie Creek.