Delaware Township is one of twelve townships in Delaware County, Indiana. According to the 2010 census, its population was 3,481 and it contained 1,591 housing units.

According to the 2020 census, the township has a total area of 29.54 square miles (76.5 km), of which 29.3 square miles (76 km) (or 99.19%) is land and 0.25 square miles (0.65 km) (or 0.85%) is water.

• Albany (south half)

• DeSoto

• Niles Township (north)
• Richland Township, Jay County (northeast)
• Green Township, Randolph County (east)
• Monroe Township, Randolph County (southeast)
• Liberty Township (south)
• Center Township (southwest)
• Hamilton Township (west)
• Union Township (northwest)

• Indiana State Road 28
• Indiana State Road 67
• Indiana State Road 167

The township contains four cemeteries: Black, Godlove, Strong and Union.

Historical population

Census	Pop.	Note	%±
1890	1,579		—
1900	3,203		102.8%
1910	2,354		−26.5%
1920	2,321		−1.4%
1930	2,391		3.0%
1940	2,642		10.5%
1950	2,960		12.0%
1960	3,596		21.5%
1970	4,201		16.8%
1980	4,267		1.6%
1990	3,781		−11.4%
2000	3,797		0.4%
2010	3,603		−5.1%
2020	3,481		−3.4%
U.S. Decennial Census

As of the census of 2020, there were 3,481 people, 1,591 households, and 814 families living in the township. The population density was 123.0 inhabitants per square mile (47.5/km). There were 1,591 housing units at an average density of 53.86 per square mile (20.8/km). The racial makeup of the township was 95.3% White, 0.6% African American, 0.4% Native American or Alaskan Native, 0.3% Asian, 0.03% Native Hawaiian or Pacific Islander, 0.4% from other races, and 2.8% from two or more races. Hispanic or Latino of any race were 1.0% of the population.

There were 1,591 households, of which 21.7% had children under the age of 18 living with them, 50.8% were married couples living together, 30.8% had a female householder with no husband present, 15.1% had a male householder with no wife present, and 3.3% were non-families. 45.9% of all households were made up of individuals. The average household size was 2.19 and the average family size was 2.86.

26.8% of the population had never been married. 52.6% of residents were married and not separated, 7.8% were widowed, 10.6% were divorced, and 2.3% were separated.

The median age in the township was 45.9. 5.9% of residents were under the age of 5; 21.7% of residents were under the age of 18; 78.3% were age 18 or older; and 22.7% were age 65 or older. 11.2% of the population were veterans.

The most common language spoken at home was English with 99.6% speaking it at home and 0.4% spoke Spanish at home. 0.9% of the population were foreign born.

The median household income in Delaware Township was $51,714, 7.9% lower than the median average for the state of Indiana. 14.4% of the population were in poverty, including 31.1% of residents under the age of 18. The poverty rate for the township was 1.5% higher than that of the state. 19.9% of the population were disabled and 5.1% had no healthcare coverage. 48.4% of the population had attained a high school or equivalent degree, 12.8% had attended college but received no degree, 10.5% had attained an Associate's degree or higher, 11.0% had attained a Bachelor's degree or higher, and 10.9% had a graduate or professional degree. 6.4% had no degree. 53.5% of Delaware Township residents were employed, working a mean of 38.7 hours per week. 155 housing units were vacant at a density of 5.2 per square mile (2.0/km).

• List of Indiana townships

• "Delaware Township, Delaware County, Indiana". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved September 24, 2009.
• United States Census Bureau cartographic boundary files

• Indiana Township Association
• United Township Association of Indiana