Van Buren County has usually voted Republican in national elections. Since 1884, the county's voters have selected the Republican Party nominee in 79% of the national elections through 2016. However, the county has become a swing county as well as a bellwether in recent years, voting for the overall winner in every presidential election from 1980 to the present day. Van Buren County operates the County jail, maintains rural roads, operates the major local courts, records deeds, mortgages, and vital records, administers public health regulations, and participates with the state in the provision of social services. The county board of commissioners controls the budget and has limited authority to make laws or ordinances. In Michigan, most local government functions – police and fire, building and zoning, tax assessment, street maintenance etc. – are the responsibility of individual cities and townships.
According to the U.S. Census Bureau, the county has a total area of, of which is land and is water. Much of the county is farmland dotted with small towns. Areas near Kalamazoo County, specifically Antwerp Township and Almena Township, are becoming suburbanized. Many of the inland lakes are ringed with homes, either by people living year-round or cottagers, generally people who live the rest of the time in Chicago. Tourism is a major industry in the areas near Lake Michigan.
The 2010 United States Census indicates Van Buren County had a 2010 population of 76,258. This decrease of -5 people from the 2000 United States Census indicated a nearly-zero population change in the decade. In 2010 there were 28,928 households and 20,434 families in the county. The population density was 125.5 per square mile. There were 36,785 housing units at an average density of 60.6 per square mile. The racial and ethnic makeup of the county was 82.7% White, 3.9% Black or African American, 0.7% Native American, 0.4% Asian, 10.2% Hispanic or Latino, 0.1% from other races, and 2.0% from two or more races. There were 28,928 households out of which 33.4% had children under the age of 18 living with them, 53.0% were husband and wife families, 12.1% had a female householder with no husband present, 29.4% were non-families, and 24.0% were made up of individuals. The average household size was 2.61 and the average family size was 3.07. The county population contained 25.5% under age of 18, 7.8% from 18 to 24, 23.7% from 25 to 44, 29.3% from 45 to 64, and 13.8% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 98.3 males. For every 100 females age 18 and over, there were 96 males. The 2010 American Community Survey 1-year estimate indicates the median income for a household in the county was $44,242 and the median income for a family was $53,642. Males had a median income of $28,079 versus $18,124 for females. The per capita income for the county was $21,495. About 10.0% of families and 14.8% of the population were below the poverty line, including 21.1% of those under the age 18 and 11.8% of those age 65 or over.