Harlem Township is located in Stephenson County, Illinois. As of the 2010 census, its population was 2,275 and it contained 981 housing units.

Geography

Harlem is Township 27 North, Range 7 East of the Fourth Principal Meridian.

According to the 2010 census, the township has a total area of 31.52 square miles (81.6 km), of which 31.42 square miles (81.4 km) (or 99.68%) is land and 0.1 square miles (0.26 km) (or 0.32%) is water.

Stagecoach inns

Tisdel Inn (Section 21) was built in 1852 by P.A. Tisdel along the Old State Road number 2, now Business U.S. Route 20. Frink, Walker & Company stage line, Chicago to Galena, used this road 1839 to 1854. The stone inn is now a residence.

Demographics

Historical population

Census	Pop.	Note	%±
2016 (est.)	2,194
U.S. Decennial Census