Cobb Island is a small island located at the confluence of the Potomac River and the Wicomico River in southern Charles County, Maryland in the United States. It is located approximately 45 miles (72 km) south of Washington, D.C., and is considered to be within the Washington, D.C. MSA. Cobb Island is separated from the mainland by Neale Sound and connected to it by a 0.11-mile-long (180 m) fixed bridge carrying Maryland Route 254.
The unincorporated community and census-designated place (CDP) of Cobb Island is located on the island. As of the 2010 census, the CDP had a population of 1,166. The community has a small post office, a volunteer fire department and rescue squad, a Baptist church, a large community green space (Fisherman's Field) and a small playground for children. Commercially, there are two seafood restaurants with marinas (Captain John's Crab House, and Shymansky's Restaurant & Marina), The Rivah, a marina with a pizzeria restaurant chain (Ledo Pizza), a small bar and grill (The Scuttlebutt), a seasonal coffee shop, art gallery & bakery (The Cove at Cobb Island), and a small market (Cobb Island Market).