Texas - Significance region: Local
| City National Bank Building |
| City of San Antonio Municipal Auditorium |
| City Public Service Company Building |
| City Water Works |
| Clanton, Moses A., House |
| Clardy, U. P., House |
| Clare, J. H., House |
| Claremont Apartments |
| Clarendon Motor Company Building |
| Clarke & Courts Building |
| Clark Hotel |
| Clarksville Historic District |
| Clark-Whitton House |
| Clayton House |
| Clayton, Lily B., Elementary School |
| Cleburne Carnegie Library |
| Cleburne Downtown Historic District |
| Clegg, L. B., House |
| Clement-Nagel House |
| Clement’s Market-The Sport Bar |
| Clendenen-Carleton House |
| Cleveland, A. S., House |
| Cleveland-Partlow House |
| Cline-Bass House |
| Cloud-Stark House |
| Cock House |
| Coggins, J. R., House |
| Cohn, Arthur B., House |
| Cohn, Joe, House |
| Cole-Hipp House |
| Coleman-Cole House |
| Collin County Mill and Elevator Company |
| Collyns House |
| Colonial Hill Historic District |
| Colorado County Courthouse |
| Colorado County Courthouse Historic District |
| Colorado River Bridge |
| Colorado River Bridge at Bastrop |
| Colston-Gohmert House |
| Comal Hotel and Klein-Kuse House |
| Comal Power Plant |
| Comanche Downtown Historic District |
| Combs, H. B., House |
| Combs-Worley Building |
| Commercial Building at 4113 Guadalupe Street |
| Community Center |
| Concord School |
| Congregation Beth Jacob |
| Conn, Adrian Edwards, House |
| Connally, Roy, House |
| Connelly-Yerwood House |
| Cook, Charles, House |
| Coombs, Charles E., House |
| Coop, Dr. B. F., House |
| Cooper, Jesse and Sara, House |
| Cooper, Madison, House |
| Cooper's Canyon Site 41 GR 25 |
| Copeland, Austin, House I |
| Copeland, Austin, House II |
| Copperas Cove Stagestop and Post Office |
| Cornelison House |
| Cornelsum, John, House |
| Corralitos Ranch |
| Corsicana Commercial Historic District |
| Corstone Sales Company |
| Cortez Hotel |
| Cottle County Courthouse Historic District |
| Cotton Belt Building |
| Cotton Belt Railroad Industrial Historic District |
| Cotton Exchange Building, Old |
| Cotulla Downtoun Historic District |
| Cotulla Ranch |
| Countryman House |
| Courtlandt Place Historic District |
| Covert, Frank M. and Annie G., House |
| Covert Park at Mount Bonnell |
| Cow Bayou Swing Bridge |
| Cox, Andrew M., Ranch Site |
| Cox-Craddock House |
| Crabapple School |
| Crain, W. H., House |
| Cranfill Apartments |
| Cranfill, Thomas, House |
| Crescent Laundry |
| Crim, Elias and Mattie, House |
| Crocheron-McDowall House |
| Crockett County Courthouse |
| Croom, Wiley J., House |
| Crouch-Perkins House |
| Crysup, J. T., House |
| CSPS Lodge-Griesser Bakery |
| Cuero Gin |
| Cuero High School |
| Cuero Hydroelectric Plant |
| Cummings House |
| Cummins Creek Bridge |
| Cunningham, Captain James & Susannah, Homestead |
| Curtis, Alice Ghormley, House |
| Cyrus, Ben C. and Jenetter, House |
| Dallam County Courthouse |
Data from United States Park Service and Wikidata
