Union is a city in and the county seat of Franklin County, Missouri, United States. The population was 10,204 at the 2010 census, with Union showing the highest growth rate in Franklin County in the last decade. It is located on the Bourbeuse River. Founded in 1827, the city is named for the ideal of political unity. Union is located at 38°26′48″N 91°0′22″W / 38.44667°N 91.00611°W / 38.44667; -91.00611 . According to the United States Census Bureau, the city has a total area of 8.1 square miles , all land. As of the 2000... United States Census, there were 7,757 people, 2,940 households, and 2,002 families residing in the city. The population density was 959.9 people per square mile . There were 3,133 housing units at an average density of 387.7 per square mile . The racial makeup of the city was 96.44% White, 1.43% African American, 0.30% Native American, 0.17% Asian, 0.23% from other races, and 1.43% from two or more races. Hispanic or Latino of any race were 0.99% of the population. There were 2,940 households out of which 35.7% had children under the age of 18 living with them, 52.
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| County: | Franklin County |
| State: | Missouri |
| Country: | United States of America |
| Population: | 9,741 |
| Area: | 8.1 sq. mi. |
| Time zone: | Central Time zone |
| Also known as: | Union, Missouri, Franklin County / Union city |