Pennsylvania - Area of significance: Architecture
| Cambria Iron Company |
| Cambria Public Library Building |
| Camelot |
| Cameron, Col. James, House |
| Cameron County Courthouse |
| Cameron, Simon, House and Bank |
| Cameron, Simon, School |
| Campbell Building |
| Camp Curtin Fire Station |
| Camp Curtin Memorial Methodist Episcopal Church |
| Camp-Woods |
| Canonsburg Armory |
| Carbon County Jail |
| Carbondale City Hall and Courthouse |
| Carlisle Armory |
| Carlisle Historic District |
| Carl Mackley Houses |
| Carnegie, Andrew, Free Library |
| Carnegie Free Library |
| Carnegie Free Library, Beaver Falls |
| Carnegie Free Library of Allegheny |
| Carnegie Free Library Of Braddock |
| Carnell, Laura H., School |
| Carpenters' Hall |
| Carson College for Orphan Girls |
| Carson, Rachel, House |
| Carter-Worth House and Farm |
| Carversville Historic District |
| Cashier's House |
| Cassese, Joseph, House |
| Cassidy, Lewis C., School |
| Catasauqua Residential Historic District |
| Catawissa Friends Meetinghouse |
| Catharine, Joseph W., School |
| Cathedral of Learning |
| Cathedral of Saints Peter and Paul |
| Catlin Hall, Wilkes College |
| Cement City Historic District |
| Centennial National Bank |
| Center Bridge Historic District |
| Center City West Commercial Historic District |
| Centerville Historic District |
| Central Bethlehem Historic District |
| Central High School |
| Central Hotel |
| Central Norristown Historic District |
| Central Railroad of New Jersey Freight Station |
| Central Railroad of New Jersey Station |
| Central Railroad of New Jersey Station |
| Central Trust Company Buildings |
| Centre Avenue YMCA |
| Centre County Courthouse |
| Centre Mills |
| Century Building |
| Century Club of Scranton |
| Chadds Ford Historic District |
| Chalfont Historic District |
| Chamberlain-Pennell House |
| Chamberlin Iron Front Building |
| Chambersburg and Bedford Turnpike Road Company Toll House |
| Chambersburg Historic District |
| Chamounix |
| Chandler, George, School |
| Chanticleer |
| Charleroi Historic District |
| Chateau Crillon Apartment House |
| Chatham Village Historic District |
| Cherry Springs Picnic Pavilion |
| Chester County Courthouse |
| Chester Creek Historic District |
| Chester Heights Camp Meeting Historic District |
| Chester Springs Historic District |
| Chester Waterside Station of the Philadelphia Electric Company |
| Chestnut Hill |
| Chestnut Hill Historic District |
| Chestnut Ridge and Schellsburg Union Church and Cemetery |
| Chestnut Street Log House |
| Cheyney, John, Log Tenant House and Farm |
| Cheyney, Squire, Farm |
| Chickies Historic District |
| Childs, George W., School |
| Christ Church |
| Christ Hamilton United Lutheran Church and Cemetery |
| Christman, Philip, House |
| Church Farm School Historic District |
| Church Hill Farm |
| Church of St. James the Less |
| Church of the Holy Trinity |
| Churchville Historic District |
| Cintra |
| Citizens National Bank of Latrobe |
| City Hall |
| City Park Brewery |
| Clarion County Courthouse and Jail |
| Clark, Sen. Joseph O., House |
| Clarkâs Ferry Tavern |
| Clark, Silas M., House |
| Clarkson-Watson House |
| Class and Nachod Brewery |
| Clayton-Frick Art Museum Historic District |
Data from United States Park Service and Wikidata
