Seymour is a city in Jackson County, Indiana, United States. Its population was 17,503 at the 2010 census. Seymour is noted for its location at the intersection of two major north/south and east/west railroads, which cross each other in the downtown area. The north/south line (the Jeffersonville, Madison and Indianapolis Railroad) was built in the 1840s and connected Indianapolis to the Ohio River at Jeffersonville. In 1852, Capt. Meedy Shields persuaded John Seymour into building the east/west railroad (the Ohio and Mississippi Railroad) through his land, and in return named the city in Seymour’s honor. The companies Aisin USA and Rose Acre Farms are headquartered in Seymour, and Cummins operates a plant in the area.
The city is also home to the largest high school gymnasium in the world.Seymour is located at 38°57′26″N 85°53′20″W (38.956350, -85.890068).According to the 2010 census, Seymour has a total area of 11.425 square miles (29.59 km2), of which 11.42 square miles (29.58 km2) (or 99.96%) is land and 0.005 square miles (0.01 km2) (or 0.04%) is water.The climate in this area is characterized by hot, humid summers and generally mild to cool winters. According to the Köppen Climate Classification system, Seymour has a humid subtropical climate, abbreviated “Cfa” on climate maps.As of the census of 2010, there were 17,503 people, 6,907 households, and 4,514 families living in the city.
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