The Bohemia, Chester, Monocacy, Blackwater, Youghiogheny, Susquehanna, Sassafras, Tred Avon, St. Mary's, Anacostia and Nanticoke rivers are considered to be some of the important perennial resources within the state. With 173 square miles of drainage, the Anacostia river possesses northeast and northwest branches as its main tributaries.
Apart from rivers, Maryland also has several natural lakes. Deep Creek Lake, Loch Raven Reservoir, Lake Oakland and Prettyboy Reservoir are shown.







