Oregon - Significance region: Local
| Bryson, J. R., House |
| Buchanan Cellers Mill |
| Buck Apartment Building |
| Buckhorn Mineral Springs Resort |
| Buckler-Henry House |
| Buehner, Philip, House |
| Buena Vista Social Clubhouse |
| Bunn, John Marion, House |
| Burford-Stanley House |
| Burggraf-Burt-Webster House |
| Burke-Clark House |
| Burkes-Belluschi House |
| Burnap-Rickard House |
| Burnaugh Building |
| Burrell Heights Apartments |
| Burrell, Walter F., House |
| Bursell, Victor and Bertha, House |
| Bush and Brey Block and Annex |
| Bush, Asahel, House |
| Bush-Breyman Block |
| Butler Bank |
| Buyers Building |
| Bybee, Frank E., House |
| Bybee, William, House |
| Byberg, Peter, House |
| Cahill-Nordstrom Farm |
| Cain House |
| Calhoun, George, House |
| Calkins, Windsor W., House |
| Calumet Hotel |
| Calvary Lutheran Church & Parsonage |
| Cameo Theatre |
| Cameron Mine |
| Camp Arboretum Sign Shop |
| Campbell Court Hotel |
| Campbell, David, Memorial |
| Campbell Hotel |
| Campbell, Richard Posey, House |
| Campbell, Robert E., House |
| Campbell Townhouses |
| Camp Namanu |
| Camp Sherman Community Hall |
| Camp White Station Hospital Administration Building |
| Canyonville Methodist Church |
| Cape Perpetua Shelter and Parapet |
| Caples, Dr. Charles G. and Lucinda McBride, Farmstead |
| Cardwell-Holman House |
| Cardwell-Parrish House |
| Carlton State and Savings Bank |
| Carpenter, A.S.V., and Helen Bundy House |
| Carter, E. V., House |
| Carter-Fortmiller House |
| Carter-Goodrich House |
| Carter, H. B., House |
| Cary, Leo J., House |
| Cate, Asa F., Farm Ensemble |
| Caton, Jesse H., House |
| Central Building |
| Central Oregon Canal Historic District (Ward Road-Gosney Road Segment) |
| Central Point Public School |
| Central School |
| Chambers, Frank L. and Ida H., House |
| Chambers, Fred E. House and Grounds |
| Chambers, Joseph and Virginia, Farmstead |
| Chambers, Matthew C., Barn |
| Champoeg Cemetery |
| Chandler Hotel and Annex |
| Chase Gardens Residential Grouping |
| Chavner Family House |
| Chemeketa Lodge No. 1 Odd Fellows Buildings |
| Cherry, Peter L., House |
| China Ditch |
| Chi Psi Fraternity House |
| Chown, Francis R., House |
| Christian, Daniel and Catherine, House |
| Christian-Patterson Rental Property |
| Churchill School |
| Citizen's Banking & Trust Co. Building |
| Clackamas Lake Ranger Station Historic District |
| Clark, Elizabeth, House |
| Clarke-Mossman House |
| Clarke, William J. and Lodema, House |
| Clark, Frank Chamberlain, House |
| Clark Historic District |
| Clark-McConnell House |
| Clark-Norton House |
| Clark, Robert F. and Elizabeth, House |
| Clatskanie IOOF Hall |
| Clatsop County Courthouse |
| Clatsop County Jail (Old) |
| Clearwater, Jacob, House |
| Clemens, Michael, House |
| Cliff Lodge |
| Clovelly Garden Apartments |
| Clyde Hotel |
| Cobb, Samuel, House |
| Cobbs, Frank J. and Maude Louise, Estate |
| Coburg Historic District |
| Cochran-Rice Farm Complex |
| Cochran, William, Barn |
Data from United States Park Service and Wikidata
