Pennsylvania - Criteria: A (event)
| Brown-Moore Blacksmith Shop |
| Brownsburg Village Historic District |
| Brown's, George, Sons Cotton and Woolen Mill |
| Brownsville Commercial Historic District |
| Brownsville Northside Historic District |
| Brumbaugh Homestead |
| Bryn Athyn Historic District |
| Bryn Mawr |
| Bryn Mawr College Historic District |
| Buchanan Furnace |
| Buck Hill Farm Covered Bridge |
| Buckingham Friends Meeting House |
| Buckmanville Historic District |
| Budd, Edward G., Manufacturing Company |
| Buffalo, Rochester & Pittsburgh Railway Indiana Passenger Station |
| Buhl Building |
| Bull, Thomas, House |
| Burk Brothers and Company |
| Burnside Plantation |
| Burns, Jeremiah, Farm |
| Burnt Cabins Gristmill Property |
| Burnt Cabins Historic District |
| Burroughs, John, Homestead |
| Bushy Run Battlefield |
| Butcher's Mill Covered Bridge |
| Butler Armory |
| Butler County Courthouse |
| Butler County National Bank |
| Butler Historic District |
| Butterworth, H.W. and Sons Company Building |
| Buttonwood Covered Bridge |
| Byecroft Farm Complex |
| Byers Station Historic District |
| Byrnes & Kiefer Building |
| Cabin Run Covered Bridge |
| Cairnbrook Historic District |
| Caldwell Tavern |
| Callahan House |
| Callowhill Industrial Historic District |
| Cambria City Historic District |
| Cambria County Courthouse |
| Cambria County Jail |
| Cambria Iron Company |
| Cameron, Simon, School |
| Camptown Historic District |
| Canonsburg Armory |
| Carbon County Jail |
| Carbondale City Hall and Courthouse |
| Carlisle Armory |
| Carlisle Historic District |
| Carlisle Indian School |
| Carl Mackley Houses |
| Carmichaels Covered Bridge |
| Carnegie Free Library |
| Carnegie Free Library |
| Carnegie Free Library, Beaver Falls |
| Carnegie Free Library of Allegheny |
| Carnegie Institute and Library |
| Carrick Furnace |
| Carrie Blast Furnace Number 6 and 7 |
| Carson College for Orphan Girls |
| Carter-Worth House and Farm |
| Carversville Historic District |
| Cashier's House |
| Catasauqua Residential Historic District |
| Catawissa Friends Meetinghouse |
| Cathedral of Learning |
| Cement City Historic District |
| Center Bridge Historic District |
| Centerville Historic District |
| Central Bethlehem Historic District |
| Central High School |
| Central Hotel |
| Central Market |
| 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 Furnace Mansion House |
| Centre Mills |
| Century Club of Scranton |
| Chadds Ford Historic District |
| Chain Bridge |
| Chalybeate Springs Hotel |
| Chamberlin Iron Front Building |
| Chambersburg and Bedford Turnpike Road Company Toll House |
| Chambersburg Historic District |
| Chandler Mill Bridge |
| Charleroi Historic District |
| Charlestown Village Historic District |
| Chatham Village Historic District |
| Cherry Springs Picnic Pavilion |
| Chester Creek Historic District |
| Chester Heights Camp Meeting Historic District |
| Chester Springs Historic District |
| Chestnut Hill Historic District |
| Chestnut Ridge and Schellsburg Union Church and Cemetery |
| Chestnut Street Log House |
| Cheyney, John, Log Tenant House and Farm |
Data from United States Park Service and Wikidata
