Welcome to Marseilles, Illinois. A city rich in history and opportunity located along the Illinois River. Marseilles is home to the Middle East Conflicts Wall Memorial, the only wall of its kind, the beautiful Illini State Park, Seattle Sutton Marseilles Museum, Middle East Conflicts Wall Memorial museum and is just minutes away from Starved Rock State Park, voted the #1 attraction in Illinois. Marseilles is one of the best-kept secrets in LaSalle County.