Vernon Township is one of eleven townships in Jennings County, Indiana, United States. As of the 2020 census, its population was 2,858 (up from 2,809 at 2010) and it contained 1,193 housing units.

Historical population

Census	Pop.	Note	%±
1890	1,477		—
1900	1,537		4.1%
1910	1,305		−15.1%
1920	1,082		−17.1%
1930	979		−9.5%
1940	1,209		23.5%
1950	1,244		2.9%
1960	1,415		13.7%
1970	1,470		3.9%
1980	2,057		39.9%
1990	2,277		10.7%
2000	2,543		11.7%
2010	2,809		10.5%
2020	2,858		1.7%
Source: US Decennial Census

According to the 2010 census, the township has a total area of 34.08 square miles (88.3 km), of which 33.98 square miles (88.0 km) (or 99.71%) is land and 0.1 square miles (0.26 km) (or 0.29%) is water. The streams of Crooked Creek, Duck Branch, Goose Run and Huckleberry Branch run through this township.

• North Vernon (southeast edge)
• Vernon (the county seat)

• Grayford
• Walnut Ridge

• Center Township (north)
• Campbell Township (northeast)
• Bigger Township (east)
• Lovett Township (southwest)
• Spencer Township (west)

The township contains six cemeteries: Baldwin, Coryell, Ebenezer, Stewart, Sullivan and Vernon.

• Indiana State Road 3
• Indiana State Road 7

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

• Indiana Township Association
• United Township Association of Indiana