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St. Joseph County, Michigan facts for kids

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Saint Joseph County
St. Joseph County Courthouse in Centreville
St. Joseph County Courthouse in Centreville
Official seal of Saint Joseph County
Seal
Map of Michigan highlighting Saint Joseph County
Location within the U.S. state of Michigan
Map of the United States highlighting Michigan
Michigan's location within the U.S.
Country  United States
State  Michigan
Founded 1829
Named for Fort St. Joseph
Seat Centreville
Largest city Sturgis
Area
 • Total 521 sq mi (1,350 km2)
 • Land 501 sq mi (1,300 km2)
 • Water 20 sq mi (50 km2)  3.9%%
Population
 (2020)
 • Total 60,939
 • Density 122/sq mi (47/km2)
Time zone UTC−5 (Eastern)
 • Summer (DST) UTC−4 (EDT)
Congressional district 6th

St. Joseph County is a county located in the U.S. state of Michigan, on the central southern border with Indiana. As of the 2020 United States Census, the population was 60,939. The county seat is Centreville.

French colonists in the late 17th century were the first Europeans to explore this territory, and they named the St. Joseph River for the patron saint of New France. This area was not part of the United States until after the American Revolutionary War. After the Treaty of Chicago was signed in 1821, regional tribes of the indigenous peoples ceded much land to the United States, opening the area for American settlement. The county was set off and organized by the Michigan Territory legislature in 1829; it was named for the river.

St. Joseph County comprises the Sturgis, MI Micropolitan Statistical Area and is included in the Kalamazoo-Battle Creek-Portage, MI Combined Statistical Area.

Demographics

Historical population
Census Pop.
1830 1,313
1840 7,068 438.3%
1850 12,725 80.0%
1860 21,262 67.1%
1870 26,275 23.6%
1880 26,626 1.3%
1890 23,356 −12.3%
1900 23,889 2.3%
1910 25,499 6.7%
1920 26,818 5.2%
1930 30,618 14.2%
1940 31,749 3.7%
1950 35,071 10.5%
1960 42,332 20.7%
1970 47,392 12.0%
1980 56,083 18.3%
1990 58,913 5.0%
2000 62,422 6.0%
2010 61,295 −1.8%
2020 60,939 −0.6%
US Decennial Census
1790-1960 1900-1990
1990-2000 2010-2018

The 2010 census indicates St. Joseph County had a 2010 population of 61,295. This decrease of -1,127 people from the 2000 United States Census represents a -1.8% population change (decrease) in that decade. In 2010 there were 23,244 households and 16,275 families in the county. The population density was 122.4 per square mile (47.3 square kilometers). There were 27,778 housing units at an average density of 55.5 per square mile (21.4 per km2). The racial and ethnic makeup of the county was 88.0% White, 2.5% Black or African American, 0.4% Native American, 0.7% Asian, 6.6% Hispanic or Latino, 0.1% from other races, and 1.8% from two or more races.

There were 23,244 households, out of which 33.0% had children under the age of 18 living with them, 52.6% were husband and wife families, 11.7% had a female householder with no husband present, 30.0% were non-families, and 24.8% were made up of individuals. The average household size was 2.60 and the average family size was 3.08.

The county population contained 25.9% under age of 18, 8.1% from 18 to 24, 23.8% from 25 to 44, 27.4% from 45 to 64, and 14.9% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 97.9 males. For every 100 females age 18 and over, there were 95.9 males.

The 2010 American Community Survey 3-year estimate indicates the median income for a household in the county was $43,964 and the median income for a family was $52,600. Males had a median income of $30,517 versus $16,388 for females. The per capita income for the county was $19,737. About 1.8% of families and 16.3% of the population were below the poverty line, including 22.3% of those under the age 18 and 12.3% of those age 65 or over.

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