Marion is a city in Grant County, Indiana, United States. The population was 29,948 as of the 2010 census. The city is the county seat of Grant County. It is named for Francis Marion, a Brigadier General from South Carolina in the American Revolutionary War.
The city is the home of Indiana Wesleyan University, the largest evangelical Christian university in the Midwest and largest private university in Indiana. Since 2003, former Olympic skater Wayne Seybold has been Marion's mayor. Marion is also noted for being the birthplace of legendary actor James Dean and famed cartoonist Jim Davis, though both were raised in nearby Fairmount. It was also the location of the wedding of actress Julia Roberts and singer Lyle Lovett in 1993.
Marion is located at 40°32′57″N 85°39′53″W / 40.54917°N 85.66472°W / 40.54917; -85.66472 (40.549140, -85.664681), along the Mississinewa River.