Ballwin is a southwestern suburb of St. Louis, located in St. Louis County, Missouri, United States. The population was 30,404 as of the 2010 census.
Ballwin was established in 1837. The community was named for John Ball, who settled at the town site in 1804. A post office called Ballwin has been in operation since 1866.
Ballwin is located at (38.594820, −90.548420). According to the United States Census Bureau, the city has a total area of 8.99 square miles (23.28 km2), all land.
Ballwin also contains several schools within Rockwood School District, including Marquette High School, including Ballwin, Westridge, and Woerther elementary schools, as well as Selvidge Middle School.
A private school in Ballwin is Holy Infant Catholic School; grades include Pre-K to Eighth Grade.
Lion’s Choice, a roast beef fast food chain, was founded in Ballwin.
The Hindu Temple of St. Louis is located in Ballwin on Weidman Road. A Islamic center is also located on Weidman road. A large population of South Asian American community has made Ballwin their home.