WEBMarion, Illinois. Coordinates: 37°43′49″N 88°55′49″W. The city of Marion is the county seat of Williamson County, Illinois, United States. [3] . The population was 16,855 at the …
WEBLearn about the history and present day of Marion, the first city in Illinois and the county seat of Williamson County. Marion is a fast-growing city with a metropolitan area …
WEBBrowse 95 listings of houses, townhomes, condos, and land for sale in Marion, IL. Filter by price, beds, baths, home type, and more. See photos, details, and contact information of …