Cass County is a county in the U.S. state of Michigan. As of the 2010 census, the population was 52,293. Its county seat is Cassopolis.
According to the U.S. Census Bureau, the county has a total area of 508 square miles (1,320 km), of which 490 square miles (1,300 km) is land and 18 square miles (47 km) (3.6%) is water. It is the smallest county in Michigan by total area.
As of the 2010 United States Census, there were 52,293 people residing in the county. 88.9% were White, 5.4% Black or African American, 1.0% Native American, 0.6% Asian, 1.1% of some other race and 3.0% of two or more races. 3.0% were Hispanic or Latino (of any race). 25.9% were of German, 10.0% English, 9.6% Irish, 8.1% American and 5.7% Polish ancestry.
As of the 2000 census, there were 51,104 people, 19,676 households, and 14,304 families residing in the county. The population density was 104 people per square mile (40/km²). There were 23,884 housing units at an average density of 48 per square mile (19/km²). The racial makeup of the county was 89.19% White, 6.12% Black or African American, 0.82% Native American, 0.54% Asian, 0.01% Pacific Islander, 1.17% from other races, and 2.15% from two or more races. 2.41% of the population were Hispanic or Latino of any race. 26.6% were of German, 11.1% American, 10.3% Irish, 10.1% English and 5.0% Polish ancestry, 96.4% spoke English and 2.0% Spanish as their first language.
There were 19,676 households out of which 31.00% had children under the age of 18 living with them, 58.20% were married couples living together, 9.90% had a female householder with no husband present, and 27.30% were not family units. 22.60% of all households were made up of individuals and 9.40% had someone living alone who was 65 years of age or older. The average household size was 2.56 and the average family size was 2.98.
In the county, the population was spread out with 25.50% under the age of 18, 7.40% from 18 to 24, 27.60% from 25 to 44, 26.00% from 45 to 64, and 13.60% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 99.90 males. For every 100 females age 18 and over, there were 97.40 males.
The median income for a household in the county was $41,264, and the median income for a family was $46,901. Males had a median income of $35,546 versus $24,526 for females. The per capita income for the county was $19,474. About 6.80% of families and 9.90% of the population were below the poverty line, including 13.60% of those under age 18 and 8.80% of those age 65 or over.