New York - Criteria: C (architecture/engineering)
| Clark House |
| Clark, Hulet, Farmstead |
| Clark-Keith House |
| Clark-Lester House |
| Clark, Peyton, Cottage |
| Clarkson Chapel |
| Clarkson Corners Historic District |
| Clarkson-Knowles Cottage |
| Clarkson Office Building |
| Clarksville Elementary School |
| Claverack Free Library |
| Clayton Historic District |
| CLEARWATER (Sloop) |
| Clermont |
| Clermont Academy |
| Clermont Civic Historic District |
| Clermont Estates Historic District |
| Cleveland, Ephraim, House |
| Cleveland, L.E., House |
| Cliffside |
| Clifton |
| Clifton Park Center Baptist Church and Cemetery |
| Clifton Park Hotel |
| Clifton Springs Sanitarium |
| Clifton Springs Sanitarium Historic District |
| Clinton Avenue Historic District |
| Clinton-Columbia Historic District |
| Clinton Corners Friends Church |
| Clinton County Courthouse Complex |
| Clinton Hall |
| Clinton Hill Historic District |
| Clinton Hill South Historic District |
| Clinton House |
| Clinton House |
| Clinton, Morris, House |
| Clinton-Rosekrans Law Building |
| Clinton Village Historic District |
| Closter Road-Oak Tree Road Historic District |
| Clymer District School No. 5 |
| Cobble Hill Historic District |
| Cobblestone Farmhouse at 1027 Stone Church Rd. |
| Cobblestone Farmhouse at 1111 Stone Church Roach |
| Cobblestone Farmhouse at 1229 Birdsey Road |
| Cobblestone Historic District |
| Cobblestone House |
| Cobblestone House |
| Cobblestone Inn |
| Cobblestone Manor |
| Cobblestone Railroad Pumphouse |
| Cobble Villa |
| Cobleskill Historic District |
| Cocaigne, Nicholas, House |
| Cochecton Center Methodist Episcopal Church |
| Cochecton Presbyterian Church |
| Cochecton Railroad Station |
| Cock-Cornelius House |
| Cocks, Isaac, House |
| Coeymans, Ariaanje, House |
| Coeymans-Bronck Stone House |
| Coeymans School |
| Cohen, H. C., Company Building-Andrews Building |
| Colbath Cottage |
| Colden Family Cemetery |
| Cold Spring Cemetery Gatehouse |
| Cold Spring Harbor Beach Club |
| Cold Spring Harbor Fire District Hook and Ladder Company Building |
| Cold Spring Harbor Laboratory Historic District |
| Cold Spring Harbor Library |
| Cold Spring Historic District |
| Cold Springs Cemetery |
| Cole Cobblestone Farmhouse |
| Cole-Hasbrouck Farm Historic District |
| Coleman Station Historic District |
| Coles, Robert T., House and Studio |
| Coletti-Rowland-Agan Farmstead |
| Colgate, Robert, House |
| College of the City of New York |
| Collingwood Opera House and Office Building |
| Collins House |
| Collins, Jonathan C., House and Cemetery |
| Collins, Nathaniel Bishop, House |
| Collinsville Cemetery |
| Collyer, Capt. Moses W., House |
| Colonial Flats and Annex |
| COLUMBIA (steamer) |
| Columbia Turnpike East Tollhouse |
| Columbia Turnpike-West Tollhouse |
| Columbus Community Church |
| Columbus Monument |
| Colvin, Addison B., House |
| Colyer House, The |
| Commack Methodist Church and Cemetery |
| Commercial Building at 32 West Bridge Street |
| Common School 32 |
| Common School No. 10 |
| Community Building |
| Community of True Inspiration Residence |
| Community Place |
| Community Theatre |
| Comstock Hall |
Data from United States Park Service and Wikidata
