Unadilla Township is a civil township of the southwest corner of Livingston County, Michigan, United States. The population was 3,190 at the 2000 census.
According to the United States Census Bureau, the township has a total area of 34.8 square miles (90 km), of which 34.0 square miles (88 km) is land and 0.8 square miles (2.1 km) (2.33%) is water.
As of the census of 2000, there were 3,190 people, 1,156 households, and 877 families residing in the township. The population density was 93.8 per square mile (36.2/km²). There were 1,292 housing units at an average density of 38.0 per square mile (14.7/km²). The racial makeup of the township was 97.34% White, 0.38% African American, 0.44% Native American, 0.38% Asian, 0.06% from other races, and 1.41% from two or more races. Hispanic or Latino of any race were 1.25% of the population.
The estimated 2002 population for Unadilla Township was 3,721.
There were 1,156 households out of which 34.3% had children under the age of 18 living with them, 63.6% were married couples living together, 7.8% had a female householder with no husband present, and 24.1% were non-families. 18.9% of all households were made up of individuals and 6.1% had someone living alone who was 65 years of age or older. The average household size was 2.74 and the average family size was 3.11.
In the township the population was spread out with 26.0% under the age of 18, 6.7% from 18 to 24, 31.2% from 25 to 44, 25.5% from 45 to 64, and 10.7% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 100.3 males. For every 100 females age 18 and over, there were 102.4 males.
The median income for a household in the township was $52,433, and the median income for a family was $58,036. Males had a median income of $42,262 versus $28,017 for females. The per capita income for the township was $21,689. About 2.5% of families and 3.2% of the population were below the poverty line, including 1.8% of those under age 18 and 4.4% of those age 65 or over.
Gregory Michigan neighborhoods include: Halfmoon, Kaiser Lakes Area, Parklawn Beach