Collinsville is a city located mainly in Madison County, and partially in St. Clair County, both in Illinois. As of the 2010 census, the city had a population of 26,016. Collinsville is approximately 12 miles from St. Louis, Missouri and is considered part of that city's Metro-East area. Famously, it is the home of the world's largest ketchup bottle, a former water tower, and is the world's horseradish capital .
Collinsville is located at 38°40′28″N 89°59′43″W / 38.67444°N 89.99528°W / 38.67444; -89.99528 (38.674398, -89.995402). According to the United States Census Bureau, the city has a total area of 13.6 square miles (35.2 km²), of which, 13.6 square miles (35.2 km²) of it is land and 0.07% is water. Collinsville is approximately 12 miles due east of Saint Louis, MO.
As of the census of 2000, there were 24,707 people, 10,458 households, and 6,672 families residing in the city. The population density was 1,817.4 people per square mile (701.9/km²). There were 11,025 housing units at an average density of 811.0 per square mile (313.2/km²). The racial makeup of the city was 91.48% White, 5.85% African American, 0.27% Native American, 0.59% Asian, 0.02% Pacific Islander, 0.59% from other races, and 1.19% Hispanic (according to the two-question "short form" of the 22nd federal census, 2000).