Berrien County is a county on the south line of Michigan, at the southwestern corner of the state. As of the 2010 census, the population was 156,813. The county seat is St. Joseph.
According to the US Census Bureau, the county has a total area of 1,581 square miles (4,090 km), of which 568 square miles (1,470 km) is land and 1,014 square miles (2,630 km) (64%) is water.
The county borders the state of Indiana to the South and includes a portion of Lake Michigan to the West.
The St. Joseph River is a major geographical feature, flowing mostly north and west through the county from Niles to its mouth on Lake Michigan at St. Joseph. The southwest of the county is drained by the Galien River and its tributaries. Paw Paw Lake is in the north of the county, along with the Paw Paw River, which flows into the St. Joseph River just before it enters Lake Michigan. A tiny portion along the Indiana state line is drained by small tributaries of the Kankakee River, which ultimately flows into the Mississippi River. This is one of two areas of Michigan drained by the Mississippi River, the other being an area of Michigan’s Upper Peninsula near the Wisconsin border.
The 2010 United States Census indicates Berrien County had a 2010 population of 156,813. This is a decrease of 5,640 people from the 2000 United States Census, or a 3.5% population decrease. In 2010 there were 63,054 households and 41,585 families in the county. The population density was 276.2 per square mile (106.6 square kilometers). There were 76,922 housing units at an average density of 135.5 per square mile (52.3 square kilometers). 78.3% of the population were White, 15.3% Black or African American, 1.6% Asian, 0.5% Native American, 0.1% Pacific Islander, 1.8% of some other race and 2.4% of two or more races. 4.5% were Hispanic or Latino (of any race). 29.0% were of German, 7.4% Irish, 6.8% English and 5.5% American ancestry.
There were 63,054 households, 29.6% of which had children under the age of 18 living with them, 47.8% were husband and wife families, 13.6% had a female householder with no husband present, 34.0% were non-families, and 28.7% were made up of individuals. The average household size was 2.43 and the average family size was 2.98.
The county population contained 23.4% under age of 18, 8.5% from 18 to 24, 23.2% from 25 to 44, 28.6% from 45 to 64, and 16.3% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 94.9 males. For every 100 females age 18 and over, there were 91.6 males.
The 2010 American Community Survey 1-year estimate indicates the median income for a household in the county was $40,329 and the median income for a family was $51,305. Males had a median income of $26,745 versus $16,289 for females. The per capita income for the county was $22,337. About 12.1% of families and 16.8% of the population were below the poverty line, including 28.5% of those under the age 18 and 8.3% of those age 65 or over.