Ohio - Significance region: Local
| Bretz Farm |
| Brewster Railroad YMCA/Wandle House |
| Brick Commercial Block |
| Brick Tavern House |
| Brick Vernacular House No. 1 |
| Brick Vernacular House No. 2 |
| Bridenbaugh District No. 3 Schoolhouse |
| Brightman House |
| Brighton-Drydon Historic District |
| Broad Street United Methodist Church |
| Broadway Avenue Historic District |
| Broadway Bridge |
| Broadway Building |
| Broadway Historic District |
| Brokaw Site |
| Bromwell, Jacob, House |
| Bronson Place |
| Brookdale Farm |
| Brooke Site |
| Brookfield Center Historic District |
| Brooklyn Bank Building |
| Brooklyn Centre Historic District |
| Brooks, James, House |
| Broom-Braden Stone House |
| Broom Building |
| Brownell School and Annex |
| Brown-Gorman Farm |
| Brownhelm Historic District |
| Brown, Jim, House |
| Brown, John, Farmhouse |
| Brown, John Hartness, House |
| Brown, Samuel N., House |
| Brown, Samuel, P., House |
| Brown Township Building |
| Brown-Wing House |
| Bruce-Macbeth Engine Company |
| Brumback Library |
| Brumberg Building |
| Brunswick-Balke-Collender Building |
| Bruns-Wynkoop House |
| Bryan Downtown Historic District |
| Bryant Building |
| Bryn Mawr |
| Buchwalter House-Applethorpe Farm |
| Buckeye Commercial Historic District |
| Buckeye State Building and Loan Company Building |
| Buckeye Station |
| Buckingham-Petty House |
| Buckner, Dr. Philip, House And Barn |
| Bucyrus Commercial Historic District |
| Bucyrus Mausoleum |
| Budd Dairy Company |
| Buehl House |
| Building at 101 North Franklin Street |
| Building at 223 West High Street |
| Building at 240 Park Avenue West |
| Building at 252-254 Park Avenue West |
| Building at 309 Park Avenue West |
| Building at 3101 Euclid Avenue |
| Building at 415 Park Avenue West |
| Building at 500 East High Street |
| Building at 505 East High Street |
| Building at 620-622 Vine Street |
| Bulen, Granville M., House and Farm Complex |
| Bullerdick, Frederick E. and Catherine, House |
| Bull, Jonah, House |
| Bullskin Creek Site |
| Bull, T.J. and Sarah, House |
| Bunker Hill House |
| Burchenal Mound |
| Burch, William, House |
| Burdick, Harold B., House |
| Burdsal, Samuel, House |
| Burgett House And Barn |
| Burlington 37 Cemetery |
| Burnett, William, House |
| Burrell Fort |
| Burrell, Jabez and Robbins, House and Cheese Factory |
| Burrell-King House |
| Burrell Orchard Site |
| Burr, George, House |
| Burt Building |
| Burton Village Historic District |
| Burt, William, House |
| Bushnell-Foos Historic District |
| Bushnell, Martin, House |
| Bush, Samuel, House |
| Bush Street Historic District |
| Butler, Charles, House |
| Butler County Courthouse |
| Butler, Cyrus, House |
| Butler, H. Karl, Memorial |
| Butler, J.G., House |
| Buttles, Aurora, House |
| Buttles-Johnson House |
| Byer Covered Bridge |
| Byers, John F., House |
| Cable, Frank, House |
| Cable, Laurence House |
| Cable Park Historic District |
Data from United States Park Service and Wikidata
