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 ~40 Water Bay Est. Parking ~30 spaces Lot Size Medium (50–150) Lot Type Surface Confidence High

Well-organized marina with covered slips and adjacent unpaved parking area along a bay shoreline, no vehicles present.

Aerial view of Decatur Harbor
inland waterway

Decatur Harbor

Decatur, AL

Decatur Harbor is a marina located in Decatur, Alabama, along the banks of the Tennessee River, a key part of the inland waterway system in the southeastern United States, specifically in the northern Alabama region near the Appalachian foothills. This marina serves recreational boating and sailing on the river's freshwater expanse, accommodating activities like cruising and fishing amidst the scenic Tennessee Valley landscape. Its position on the Tennessee River provides access to a network of navigable waterways extending through the Midwest and South.

Location Decatur, Morgan County, Alabama
Capacity ~40 slips
Coordinates 34.6172, -86.9697

Nearby Marinas in Alabama

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.