Andover Township is one of twenty-four townships in Henry County, Illinois, USA. As of the 2020 census, its population was 881 and it contained 399 housing units.

Geography

According to the 2010 census, the township has a total area of 36.58 square miles (94.7 km), all land.

Cities, towns, villages

• Andover

Adjacent townships

• Osco Township (north)
• Munson Township (northeast)
• Cambridge Township (east)
• Weller Township (southeast)
• Clover Township (south)
• Lynn Township (west)
• Western Township (northwest)

Cemeteries

The township contains these three cemeteries: Andover Township, Presbyterian and Rose Dale.

Major highways

• Illinois Route 81

Airports and landing strips

• Boyd Wheatleys Farm Airport
• Wheatley Landing Strip

Demographics

Historical population

Census	Pop.	Note	%±
2016 (est.)	941
U.S. Decennial Census

School districts

• Alwood Community Unit School District 225
• Cambridge Community Unit School District 227
• Orion Community Unit School District 223

Political districts

• Illinois's 17th congressional district
• State House District 71
• State Senate District 36