Cities and towns

• Eaton (south edge)
• Muncie (north edge)

Unincorporated towns

• Anthony
• Royerton

Adjacent townships

• Union Township (north)
• Niles Township (northeast)
• Delaware Township (east)
• Liberty Township (southeast)
• Center Township (south)
• Harrison Township (west)
• Washington Township (northwest)

Major highways

• U.S. Route 35
• Indiana State Road 3
• Indiana State Road 28
• Indiana State Road 67

Cemeteries

The township contains four cemeteries: Cullen, Gardens of Memory, Stafford and a cemetery discovered in 2021 by the Delaware County Historical Society's Pioneer Cemetery Preservation Committee about 0.5 miles southwest of Anthony.

2020 census

As of the census^[2] of 2020, there were 7,169 people, 2,785 households, and 2,131 families living in the township. The population density was 240.7 inhabitants per square mile (92.9/km²). There were 2,969 housing units at an average density of 99.70 per square mile (38.5/km²). The racial makeup of the township was 92.2% White, 2.2% African American, 1.0% Asian, 0.1% Native American or Alaskan Native, 0.01% Native Hawaiian or Pacific Islander, 0.7% from other races, and 3.7% from two or more races. Hispanic or Latino of any race were 2.1% of the population.

There were 2,785 households, of which 19.0% had children under the age of 18 living with them, 57.1% were married couples living together, 25.7% had a female householder with no husband present, 13.1% had a male householder with no wife present, and 4.1% were non-families. 38.8% of all households were made up of individuals. The average household size was 2.57 and the average family size was 2.64.

19.7% of the population had never been married. 58.3% of residents were married and not separated, 8.4% were widowed, 12.7% were divorced, and 0.9% were separated.

The median age in the township was 44.9. 4.8% of residents were under the age of 5; 19.0% of residents were under the age of 18; 81.0% were age 18 or older; and 24.4% were age 65 or older. 6.3% of the population were veterans.

The most common language spoken at home was English with 97.4% speaking it at home, 1.7% spoke Spanish at home, 0.7% spoke an Asian or Pacific Islander language at home, and 0.2% spoke another Indo-European language at home. 3.7% of the population were foreign born.

The median household income in Hamilton Township was $68,925, 22.7% greater than the median average for the state of Indiana. 6.9% of the population were in poverty, including 8.9% of residents under the age of 18. The poverty rate for the township was 6.0% lower than that of the state. 10.5% of the population were disabled and 3.5% had no healthcare coverage. 27.6% of the population had attained a high school or equivalent degree, 26.0% had attended college but received no degree, 9.3% had attained an Associate's degree or higher, 17.0% had attained a Bachelor's degree or higher, and 15.2% had a graduate or professional degree. 4.9% had no degree. 58.0% of Hamilton Township residents were employed, working a mean of 39.3 hours per week. 184 housing units were vacant at a density of 6.2 per square mile (2.4/km²).