Northfield Township, Cook County, Illinois
|— Township —|
|Established||April 2, 1850|
|• Supervisor||Jill A. Brickman|
|• Total||34.64 sq mi (89.72 km2)|
|• Land||34.30 sq mi (88.84 km2)|
|• Water||0.34 sq mi (0.89 km2) 0.99%|
|Elevation||650 ft (198 m)|
|• Density||2,481/sq mi (957.9/km2)|
|Time zone||CST (UTC-6)|
|• Summer (DST)||CDT (UTC-5)|
|ZIP codes||60015, 60016, 60022, 60025, 60026, 60056, 60062, 60070, 60090, 60091, 60093|
|GNIS feature ID||0429457|
Northfield Township is one of thirty townships in Cook County, Illinois, USA. As of the 2010 census, its population was 85,102. The township office is located in the Passport Plaza Building in Glenview. The township was established on April 2, 1850.
According to the United States Census Bureau, Northfield Township covers an area of 34.64 square miles (89.7 km2); of this, 34.3 square miles (89 km2) (99.02 percent) is land and 0.34 square miles (0.88 km2) (0.99 percent) is water.
Cities, towns, villages 
- Northbrook (vast majority)
- Northfield (west three-quarters)
- Prospect Heights (east edge)
- Wilmette (west edge)
- Des Plaines (north edge; forest preserves)
Adjacent townships 
- Moraine Township, Lake County (north)
- West Deerfield Township, Lake County (north)
- New Trier Township (east)
- Niles Township (southeast)
- Maine Township (southwest)
- Wheeling Township (west)
- Vernon Township, Lake County (northwest)
The township contains these seven cemeteries: North Northfield, Northfield Union, Oak Wood, Sacred Heart, Saint Johns, Saint Marys and Sunset Memorial Lawns.
Major highways 
Airports and landing strips 
- Evanston/Glenbrook Heliport
- Plaza Heliport
- E J Beck Lake
Political districts 
- Illinois' 10th congressional district
- State House District 15
- State House District 17
- State House District 57
- State House District 58
- State House District 59
- State Senate District 08
- State Senate District 09
- State Senate District 29
- State Senate District 30
- "Northfield Township, Cook County, Illinois". Geographic Names Information System, U.S. Geological Survey. Retrieved 2010-01-10.
- United States Census Bureau 2007 TIGER/Line Shapefiles
- United States National Atlas
- "Geographic Identifiers: 2010 Demographic Profile Data (DP-1): Northfield township, Cook County, Illinois". U.S. Census Bureau, American Factfinder. Retrieved March 21, 2013.
- "Contact Us." Northfield Township. Retrieved on August 9, 2010.
- "About Northfield Township". Northfield Township. Retrieved 2007-03-13.
- "Contact Us." Allstate. Retrieved on August 9, 2010.
- "Northbrook village, Illinois." U.S. Census Bureau. Retrieved on August 9, 2010.
- Northfield Township official website
- Northfield Township Road District
- History of Northfield
- Illinois State Archives
- Township Officials of Illinois
- Cook County official site