Prairie Township is a township in Delaware County, Iowa, United States. As of the 2000 census, its population was 373.

Prairie Township covers an area of 35.16 square miles (91.07 square kilometers).

• Coffins Grove Township (north)
• Delaware Township (northeast)
• Milo Township (east)
• Hazel Green Township (southeast)
• Adams Township (south)
• Newton Township, Buchanan County (southwest)
• Middlefield Township, Buchanan County (west)

The township contains one cemetery, Sand Creek.

• U.S. Route 20

• U.S. Board on Geographic Names (GNIS)
• United States Census Bureau cartographic boundary files

• US-Counties.com
• City-Data.com