Onondaga Township, Michigan
Civil township
Location within Ingham County
Onondaga Township Location within the state of Michigan Show map of Michigan Onondaga Township Location within the United States Show map of the United States
Coordinates: 42°27′29″N 84°33′22″W / 42.45806°N 84.55611°W / 42.45806; -84.55611
Country	United States
State	Michigan
County	Ingham
Government
• Supervisor	Phil Hutchison
• Clerk	Marcie Seavolt
Area
• Total	36.49 sq mi (94.51 km2)
• Land	36.11 sq mi (93.52 km2)
• Water	0.38 sq mi (0.98 km2)
Elevation	938 ft (286 m)
Population  (2020)
• Total	2,997
• Density	82/sq mi (32/km2)
Time zone	UTC-5 (Eastern (EST))
• Summer (DST)	UTC-4 (EDT)
ZIP code(s)	48827 (Eaton Rapids) 48854 (Mason) 49251 (Leslie) 49264 (Onondaga)
Area code	517
FIPS code	26-60800[1]
GNIS feature ID	1626849[2]

Onondaga Township is a civil township of Ingham County in the U.S. state of Michigan. The population was 2,997 at the 2020 census.^[3]

• Onondaga is an unincorporated community located within the township.^[4] The Onondaga 49264 ZIP Code serves the majority of the township, as well as smaller areas in Hamlin Township to the west and Tompkins Township to the south.^[5]

According to the United States Census Bureau, the township has a total area of 36.49 square miles (94.51 km²), of which 36.11 square miles (93.52 km²) is land and 0.38 square miles (0.98 km²) (1.04%) is water.^[6]

As of the census^[1] of 2000, there were 2,958 people, 993 households, and 802 families residing in the township. The population density was 81.0 inhabitants per square mile (31.3/km²). There were 1,031 housing units at an average density of 28.2 per square mile (10.9/km²). The racial makeup of the township was 95.44% White, 0.30% African American, 0.27% Native American, 0.03% Asian, 0.10% Pacific Islander, 1.93% from other races, and 1.93% from two or more races. Hispanic or Latino of any race were 2.94% of the population.

There were 993 households, out of which 42.3% had children under the age of 18 living with them, 68.4% were married couples living together, 8.2% had a female householder with no husband present, and 19.2% were non-families. 15.1% of all households were made up of individuals, and 4.5% had someone living alone who was 65 years of age or older. The average household size was 2.91 and the average family size was 3.20.

In the township the population was spread out, with 30.6% under the age of 18, 6.5% from 18 to 24, 32.2% from 25 to 44, 23.6% from 45 to 64, and 7.1% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 101.0 males. For every 100 females age 18 and over, there were 100.4 males.

The median income for a household in the township was $52,216, and the median income for a family was $57,500. Males had a median income of $39,519 versus $28,900 for females. The per capita income for the township was $18,981. About 5.6% of families and 9.0% of the population were below the poverty line, including 8.8% of those under age 18 and 8.1% of those age 65 or over.