Population • Marion County was established in 1824.
• The 1830 census for Marion shows a population of 287 • The 1840 census for Marion shows a population of 570. --- The 2010 census for Marion shows a population of 66,501.
Counties that surround Marion County, Ohio
Northeast - Crawford County East - Morrow County South - Delaware County Southwest - Union County West - Hardin County Northwest - Wyandot County
Marion County was formed from Delaware County
In 1848 - Part of Marion (5 townships: Canaan, Cardington, Gilead, Morven, and Washington) was given to Morrow County
In exchange, for losing the 5 townships, Marion County gained from Delaware County what is now Waldo Township.
Marion County Ohio today
Marion County City - Marion, Ohio Villages - Caledonia, Green Camp, LaRue, Morral, New Bloomington, Prospect, and Waldo Townships - Big Island, Bowling Green, Claridon, Grand, Grand Prairie, Green Camp, Marion, Montgomery, Pleasant, Prospect, Richland, Salt Rock, Scott, Tully, and Waldo.