There are more than 1,500 properties and districts listed on the National Register of Historic Places in the U.S. state of Maryland. Each of the state's 23 counties and its one county-equivalent (the independent city of Baltimore) has at least 20 listings on the National Register.
Current listings by county The following are approximate tallies of current listings in Maryland on the National Register of Historic Places. These counts are based on entries in the National Register Information Database as of April 24, 2008 and new weekly listings posted since then on the National Register of Historic Places web site. There are frequent additions to the listings and occasional delistings, and the counts here are not official. Also, the counts in this table exclude boundary increase and decrease listings which modify the area covered by an existing property or district and which carry a separate National Register reference number.
County # of sites 1 Allegany 46 2 Anne Arundel 110 3 Baltimore (city) 316 4 Baltimore County 94 5 Calvert 20 6 Caroline 24 7 Carroll 62 8 Cecil 54 9 Charles 43 10 Dorchester 30 11 Frederick 104 12 Garrett 20 13 Harford 80 14 Howard 45 15 Kent 44 16 Montgomery 83 17 Prince George's 111 18 Queen Anne's 41 19 Somerset 73 20 St. Mary's 32 21 Talbot 4 22 Washington 104 23 Wicomico 26 24 Worcester 36 (duplicates) (29)The following sites are listed in multiple counties: Chesapeake and Ohio Canal National Historical Park (Allegany, Frederick, Montgomery and Washington), Dundalk Historic District (Baltimore (city) and Baltimore County), Hopewell (Carroll and Frederick), Inns on the National Road (Allegany and Garrett), Jericho Covered Bridge (Baltimore and Harford), James Lawrence Kernan Hospital (Baltimore (city) and Baltimore County), McKinstry's Mills Historic District (Carroll and Frederick), Mount Airy Historic District (Carroll and Frederick), My Lady's Manor (Baltimore and Harford), Old National Pike Milestones (Alleghany, Baltimore (city), Baltimore County, Carroll, Frederick, Howard and Washington), Patterson Viaduct Ruins (Baltimore and Howard), Thomas Viaduct, Baltimore & Ohio Railroad (Baltimore and Howard), Western Maryland Railroad Right-of-Way, Milepost 126 to Milepost 160 (Alleghany and Washington), Wye Mill (Queen Anne's and Talbot), Moyaone Reserve (Prince George's and Charles), MD 214 over Patuxent River Bridge (Prince George's and Anne Arundel). Delaware Boundary Markers appear in seven counties. Total: 1,632
See also
List of National Historic Landmarks in Maryland List of bridges on the National Register of Historic Places in Maryland List of historical societies in Maryland
References