The South River is a  tributary of the Chesapeake Bay in Anne Arundel County, Maryland in the United States. It lies south of the Severn River, east of the Patuxent River, and north of the West River and Rhode River, and drains to the Chesapeake Bay.

South River is an unincorporated community in Anne Arundel County, Maryland, United States.  South River Club was listed on the National Register of Historic Places in 1969.