New York - Area of significance: Architecture
| 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 Landing Historic District |
| Coeymans School |
| Cohen, H. C., Company Building-Andrews Building |
| COIMBRA (shipwreck and remains) |
| Colbath Cottage |
| Colden Hill Farm |
| 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 |
| 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 |
| Colgate-Rochester (Crozer) Divinity School |
| 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 |
| Collyer, Capt. Moses W., House |
| Colonial Flats and Annex |
| Colony Arcade Building |
| Columbia Turnpike East Tollhouse |
| Columbia Turnpike-West Tollhouse |
| Columbus Community Church |
| Colvin, Addison B., House |
| Colyer House, The |
| Commack Methodist Church and Cemetery |
| Commercial Building at 32 West Bridge Street |
| Common School No. 10 |
| Community Building |
| Community of True Inspiration Residence |
| Community Place |
| Community Theatre |
| Comstock Hall |
| Comstock, Nathan, Jr., House |
| Comstock, Zephnia, Farmhouse |
| Conant, Austin R., House |
| Concklin, Abner, House |
| Concourse Yard Entry Buildings |
| Concourse Yard Substation |
| Conesus Amusement Hall |
| Coney Island Fire Station Pumping Station |
| Coney Island Yard Electric Motor Repair Shop |
| Coney Island Yard Gatehouse |
| Congdon, Hiram, House |
| Congregation Ahavas Achim Anshi Austria |
| Congregational Church |
| Congregational Church of Patchogue |
| Congregational Church of the Evangel |
| Congregation Beth Abraham |
| Congregation Bnai Israel Synagogue |
| Congregation B'nai Jeshurun Synagogue and Community House |
| Congregation Chevra Linath Hazedeck |
| Congregation Ohab Zedek |
| Congregation Shaare Zedek of Harlem |
| Congregation Tifereth Israel |
| Congregation Tifereth Israel |
| Congregation Tifereth Yehuda Veyisroel |
| Conkey House |
| Conklin, David, House |
| Conklin Farm |
| Conkling-Boardman-Eldridge Farm |
| Conklin Mountain House |
| Conklin, Nathaniel, House |
| Conklin Town Hall |
| Connecticut Street Armory |
| Connors, William, Paint Manufacturing Company Building |
| Consolidated Car Heating Company Complex |
| Constable Hall |
| Constableville Village Historic District |
| Contempora House |
| Continental Baking Company Factory |
| Control House on 72nd Street |
| Coolidge Stores Building |
| Coons, Charles H., Farm |
| Coons House |
| Cooper Avenue Row Historic District |
| Cooperstown Historic District |
| Copake Falls Methodist Episcopal Church |
| Copake Grange Hall |
| Copake Iron Works Historic District |
| Copake Memorial Clock |
| Copake Railroad Depot |
| Copake United Methodist Church and Copake Cemetery |
| Copcutt,John,Mansion |
| Copeland Carriage Shop |
Data from United States Park Service and Wikidata
