Maryland - Significance region: Local
| Brandenburg, Henry, House |
| Branton Manor |
| Brentwood Farm |
| Brewers Exchange |
| Brewers Hill Historic District |
| Brick Hill |
| Brick House Farm |
| Brick House on the Pike |
| Brinsfield I Site |
| Broad Creek Historic District |
| Brookefield of the Berrys |
| Brooklandville House |
| Broom's Bloom |
| Brown, Alex, Building |
| Brown, Jeremiah, House and Mill Site |
| Brown, Mercer, House |
| Brown, Moses, House |
| Brown's Arcade |
| Bryantown Historic District |
| Buckeystown Historic District |
| 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 |
| Buildings at 1601-1830 St. Paul Street and 12-20 E. Lafayette Street |
| Bullfrog Road Bridge |
| Bumpstead Archeological Site |
| Bunker Hill |
| Burkittsville |
| Burleigh |
| Burle's Town Land |
| Business and Government Historic District |
| Butchers Hill Historic District |
| Butler House |
| Caldicott |
| Caleb's Discovery |
| Calloway, Thomas J., House |
| Calvert Hills Historic District |
| Cambridge Historic District, Wards I and III |
| Canada Hose Company Building |
| Cannonball House |
| Canton House |
| Captain's Houses |
| Carderock Springs Historic District |
| Carousel at Glen Echo Park |
| Carrollton Hall |
| Carrollton Manor |
| Catalpa Farm |
| Cathedral Hill Historic District |
| Catonsville Historic District, Old |
| Caves Valley Historic District |
| Cecil Apartments |
| Cecil's Mill Historic District |
| Cedarcroft Historic District |
| Cedar Grove |
| Cedar Grove |
| Cedar Hill |
| Central Catonsville and Summit Park Historic District |
| Centreville Historic District |
| Ceres Bethel AME Church |
| Chamber of Commerce Building |
| Chambers Park Log Cabin |
| Chance Boatyard |
| Chanceford |
| Chapel Hill Historic District |
| Chapel of the Incarnation |
| Charles Village-Abell Historic District |
| Chautauqua Tower |
| Cherry Grove, HO-1 |
| Chestertown Railroad Station |
| Chestnut Ridge |
| Cheverly Historic District |
| Childs Residence |
| Chinatown Historic District |
| Chizuk Amuno Synagogue |
| Choate House |
| Christ Church |
| Christ Church, Graveyard and Sexton's House |
| Christ Church Guilford |
| Christ Episcopal Church |
| Christ Episcopal Church and Cemetery |
| Churchill Threatre-Community Building |
| Churchman, John, House |
| Church of the Holy Trinity |
| Churchville Presbyterian Church |
| Citizens State Bank |
| City Hall |
| Clagett House at Cool Spring Manor |
| Clagett, Robert, Farm |
| Clarke, Littleton T., House |
| Clemson, Joanna & Dennis D. H., Farm |
| Clifton Park |
| Clifton School |
| Cloisters, The |
| Clover Hill |
| Coca-Cola Baltimore Branch Factory |
Data from United States Park Service and Wikidata
