Marion is a city in the U.S. state of Ohio and the county seat of Marion County. The municipality is located in north-central Ohio, approximately 50 miles (80 km) north of Columbus.
The population was 35,318 at the 2000 census. According to the US Census 2008 estimate, Marion has a population of 35,841, while Ohio's Columbus–Marion–Chillicothe Combined Statistical Area has 2,002,604 people. Marion is the county's largest city and the center of the Marion Micropolitan Statistical Area (as defined by the United States Census Bureau in 2003). President Warren G. Harding was a native of Marion.
The origins of Marion can be traced back to the War of 1812 when Jacob Foos, a surveyor for General Harrison's army, discovered a spring at the top of a hill and established a well there which was named "Jacob's Well". At the time it was a stopover for troops on their way from Ft. Franklin (Columbus) to Toledo. Legend has it that in the middle of the night Foos awoke with a terrible thirst. He began to dig and told his fellow travelers that he was going to dig till he found either water or hell. This well was located near what is now Marion Towers on Delaware Ave. The town of Marion was platted north of Jacob's Well in 1822 by Alexander Holmes and Eber Baker; Marion County was established in 1824.