Maryland - Significance region: Local
| Abell house |
| Abington Farm |
| Abraham Hall |
| Academy Grove Historic District |
| Acquinsicke |
| Adams Farm |
| Aigburth Vale |
| Airview Historic District |
| Airy Hill |
| Aisquith Farm E Archeological Site |
| Alcott, Louisa May, School |
| All Faith Church |
| All Hallows Episcopal Church |
| All Saints' Church |
| Ambassador Theater |
| Amelung House and Glassworks |
| American Ice Company |
| American Ice Company Baltimore Plant No. 2 |
| Anderson Chapel |
| Anneslie Historic District |
| Antietam Furnace Complex Archeological Site |
| Appler-Englar House |
| Arcadia |
| Arcadia-Beverly Hills Historic District |
| Arch Social Club |
| Arlington |
| Arter, Philip and Uriah, Farm |
| Artisan's House |
| Asbury Methodist Episcopal Church |
| Ashland |
| Athol |
| Auchentoroly Terrace Historic District |
| Avalon |
| Avery, Capt. Salem, House |
| Avondale Mill |
| Bachelor's Hope |
| Bagby Furniture Company Building |
| Baker, James B., House |
| Ballestone Mansion |
| Baltimore and Ohio Locust Point Grain Terminal Elevator |
| Baltimore City College |
| Baltimore City College |
| Baltimore City Passenger Railway Power House and Car Barn |
| Baltimore College of Dental Surgery |
| Baltimore County Courthouse |
| Baltimore County Jail |
| Baltimore County School No. 7 |
| Baltimore East/South Clifton Park Historic District |
| Baltimore Federal Savings & Loan Association |
| Baltimore Gas and Electric Company Building |
| Baltimore General Dispensary |
| Baltimore Grand |
| Baltimore Hebrew Congregation Synagogue |
| Baltimore Light Station |
| Bankard-Gunther Mansion |
| Barclay-East Baltimore-Midway Historic District |
| Bard's Field |
| Bare Hills Historic District |
| Bare Hills House |
| Barnaby House |
| Barre Circle Historic District |
| Bates, Wiley H., High School |
| Beale, Edward, House |
| Beall's Pleasure |
| Beauchamp House |
| Beaudley |
| Bel Air Courthouse Historic District |
| Bel Alton High School |
| Bellevue |
| Bellona-Gittings Historic District |
| Bell Tower Building |
| Bell-Varner House |
| Belt, J. A., Building |
| Bennett-Kelly Farm |
| Benson Building |
| Benson-Hammond House |
| Berea-Biddle Street Historic District |
| Berkley Crossroads Historic District |
| Berkley School |
| Berlin Commercial District |
| Best Endeavor |
| Bethesda Theatre |
| Bethlehem Methodist Episcopal Church |
| Betterton Historic District |
| Big Bottom Farm |
| Biggs Ford Site |
| Biggs, William and Catherine, Farm |
| Bingham-Brewer House |
| Bishopton |
| Bloomsbury |
| Bohemian National Cemetery |
| Boonsboro Historic District |
| Borden Mines Superintendent's House |
| Borderside |
| Bounds Lott |
| Bowie Railroad Buildings |
| Bowling Heights |
| Bowlus Mill House |
| Bowman House |
| Brampton |
Data from United States Park Service and Wikidata
