Cambridge Township is a civil township of Lenawee County in the U.S. state of Michigan. The population was 5,299 at the 2000 census. According to the United States Census Bureau, the township has a total area of 35.5 square miles (92 km2), of which 32.0 square miles (83 km2) is land and 3.5 square miles (9.1 km2) is water, a total of 9.80%. As of the census of 2000, there were 5,299 people, 1,996 households, and 1,566 families in the township. The population density was 165.5 per square mile (63.9/km2). There were 2,686 housing units at an average density of 83.9 per square mile (32.4/km2). The racial makeup of the township was 97.30% White, 0.15% African American, 0.36% Native American, 0.26% Asian, 0.66% from other races, and 1.26% from two or more races.
Hispanic or Latino of any race were 2.02% of the population. Of the 1,996 households, 33.9% had children under the age of 18 living with them, 68.8% were married couples living together, 6.4% had a female householder with no husband present, and 21.5% were non-families. 17.8% of households were one person, and 6.9% were one person aged 65 or older. The average household size was 2.65 and the average family size was 3.01. In the township the population was spread out, with 25.8% under the age of 18, 6.1% from 18 to 24, 27.8% from 25 to 44, 29.1% from 45 to 64, and 11.3% 65 or older. The median age was 40 years. For every 100 females, there were 99.4 males. For every 100 females age 18 and over, there were 97.5 males.
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