Shelby is a civil township of Oceana County in the U.S. state of Michigan. The population was 3,951 at the 2000 census. The village of Shelby is located within the township. According to the United States Census Bureau, the township has a total area of 36.1 square miles (93.5 km2), of which, 36.0 square miles (93.2 km2) is land and 0.1 square miles (0.3 km2) is water. As of the census of 2000, there were 3,951 people, 1,388 households, and 1,059 families residing in the township. The population density was 109.8 per square mile (42.4/km2). There were 1,502 housing units at an average density of 41.7 per square mile (16.1/km2). The racial makeup of the township was 86.84% White, 0.10% African American, 1.11% Native American, 0.08% Asian, 0.10% Pacific Islander, 9.64% from other races, and 2.13% from two or more races. Hispanic or Latino of any race were 18.32% of the population.
There were 1,388 households, out of which 38.0% had children under the age of 18 living with them, 62.3% were married couples living together, 10.7% had a female householder with no husband present, and 23.7% were non-families. 20.7% of all households were made up of individuals, and 11.7% had someone living alone who was 65 years of age or older. The average household size was 2.82 and the average family size was 3.26. By age, 30.5% of the population was under 18, 9.2% from 18 to 24, 25.8% from 25 to 44, 20.9% from 45 to 64, and 13.6% were 65 or older.
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