Maryland - Role: Building
| Bethesda Meetinghouse |
| Bethesda Naval Hospital Tower |
| Bethesda Theatre |
| Bethlehem Methodist Episcopal Church |
| Beverly |
| Beverly |
| Big Bottom Farm |
| Biggs, William and Catherine, Farm |
| Bingham-Brewer House |
| Bishopton |
| Bloomingdale |
| Bloomsbury |
| Bohemia Farm |
| Bon Air |
| Borden Mines Superintendent's House |
| Borderside |
| Bostwick |
| Bounds Lott |
| Bowie Railroad Buildings |
| Bowieville |
| Bowling Heights |
| Bowlingly |
| Bowlus Mill House |
| Bowman House |
| Brampton |
| Brandenburg, Henry, House |
| Branton Manor |
| Brentwood Farm |
| Brewers Exchange |
| Brice House |
| Brick House Farm |
| Brick House on the Pike |
| Brightwood |
| Brookefield of the Berrys |
| Brooklandville House |
| Brooklandwood |
| Broom's Bloom |
| Brown, Alex, Building |
| Brown, Mercer, House |
| Brown, Moses, House |
| Brown's Arcade |
| Buck House |
| Buckingham House and Industrial School Complex |
| Buena Vista |
| Building at 239 North Gay Street |
| Building at 409 West Baltimore Street |
| Building at 419 West Baltimore Street |
| Building at 423 West Baltimore Street |
| Buildings at 10, 12, 14, and 16 East Chase Street |
| Bunker Hill |
| Burleigh |
| Burley Manor |
| Burrages End |
| Butler House |
| Butler, Wright, House |
| Caldicott |
| Caleb's Discovery |
| Callahan, John, House |
| Calloway, Thomas J., House |
| Canada Hose Company Building |
| Cannonball House |
| Cannon, Burton, House |
| Canton House |
| Captain's Houses |
| Carroll County Almshouse and Farm |
| Carroll Mansion |
| Carrollton Hall |
| Carrollton Manor |
| Carson, Rachel, House |
| Carvill Hall |
| Castle Hall |
| Catalpa Farm |
| Cecil Apartments |
| Cedar Grove |
| Cedar Grove |
| Cedar Grove |
| Cedar Hill |
| Cedar Hill |
| Cedar Park |
| Centreville Armory |
| Ceres Bethel AME Church |
| Chamber of Commerce Building |
| Chambers Park Log Cabin |
| Chance Boatyard |
| Chanceford |
| Chapel of the Incarnation |
| Chapline, William, House |
| Charlcote House |
| Chase-Lloyd House |
| Chautauqua Tower |
| Cherry Grove, HO-1 |
| Chesapeake Beach Railway Station |
| Chester Hall |
| Chestertown Armory |
| Chestertown Railroad Station |
| Chesterville Brick House |
| Chestnut Ridge |
| Childs Residence |
| Chiswell's Inheritance |
| Chizuk Amuno Synagogue |
Data from United States Park Service and Wikidata
