Notice Not affiliated with the Master Mariners Benevolent Association (MMBA) or any successor organization. v.2026.05
General Overview
Facility 🚤 Full Service Marina Est. Slips ~60 Water Ocean/Bay Confidence High

Medium-sized marina with multiple piers packed with boats on a bay, surrounded by wooded islands, but no visible parking lot or vehicles.

Aerial view of Marina Office
Great Lakes

Marina Office

Williamson County, IL

Marina Office is located in Williamson County, Illinois, in the southern part of the state, nestled within the Shawnee Hills region characterized by rolling hills, forests, and proximity to man-made lakes like Crab Orchard Lake, though it is not actually on the Great Lakes as the Great Lakes are hundreds of miles north in northern Illinois. It serves recreational boating and sailing on these inland freshwater lakes and nearby rivers, catering to activities such as fishing, pleasure cruising, and local water sports in this rural, landlocked area.

Location Williamson County, Williamson County, Illinois
Capacity ~60 slips
Coordinates 37.6429, -89.1413

Nearby Marinas in Illinois

Marina Parking & Access Control

Marinas typically need to separate slip holder parking from day-visitor parking, trailer areas, launch ramps, and secure dock access points. Modern facilities use barrier gate systems to enforce these zones automatically — allowing permitted vehicles through via transponder or keycard while logging all access events.