Indiana - Significance region: Local
| Cannelton Historic District |
| Cantol Wax Company Building |
| Carmichael, Otto, House |
| Carnahan, Magnus J., House |
| Carnegie Hall of Moores Hill College |
| Carnegie Library of Covington |
| Carnegie Public Library |
| Carolyn Mosby Senior High Rise |
| Carpenter, Willard, House |
| Carr High School |
| Carroll County Courthouse |
| Carroll County Infirmary |
| Carrollton Bridge |
| Carr's Hall |
| Carter-Randall-Parker House |
| Cascades Park |
| Cathcart |
| Cathedral of St. James and Parish Hall |
| Cathedral of the Immaculate Conception |
| Catherine Street Historic District |
| Cavanaugh Bridge |
| Cedar Bough Place Historic District |
| Cedar Lodge |
| Cedar Point Farm |
| Centennial Neighborhood District |
| Center Ridge Cemetery |
| Center Township Grade and High School |
| Central Avenue School |
| Central Batesville Historic District |
| Central Court Historic District |
| Central High School & Boys Vocational School |
| Central House |
| Centralia Court Historic District |
| Central Library |
| Champ's Ford Bridge |
| Chapin, Horatio, House |
| Chapin Park Historic District |
| Chatham-Arch Historic District |
| Chauncey-Stadium Avenues Historic District |
| Chenoweth-Coulter Farm |
| Chesterfield Spiritualist Camp District |
| Chesterton Commercial Historic District |
| Chesterton Residential Historic District |
| Chicago and Erie Railroad Tippecanoe River Bridge |
| Chicago Mica Co.- Continental Diamond Fibre Co.-ANCO Factory |
| Chief Menominee Memorial Site |
| Children's Dispensary |
| Chinworth Bridge |
| Christamore House |
| Christian Park School No. 82 |
| Christian Ridge Historic District |
| Chute, Haller T., Building |
| Cincinnati, Richmond, & Muncie Depot |
| Circle Theater |
| Citizens Bank |
| Citizens National Bank |
| Citizens' Trust Company Building |
| City Hall |
| City Market |
| Clampitt Site |
| Clark-McKinley Historic District |
| Clark, Orin, House |
| Clark, Wellington A., House |
| Clay County Courthouse |
| Clay County Hospital |
| Clifford, Patrick and Catherine, House |
| Cline, Cyrus and Jennie, House |
| Clinton Downtown Historic District |
| Clore Plow Works-J.W. Whitlock and Company |
| Cloverdale Historic District |
| Clover Ford Iron Bridge |
| Coambs, Norris and Harriet, Lustron House |
| Coburn, Henry P., Public School No. 66 |
| Coca-Cola Bottling Company Plant |
| Coca-Cola Bottling Plant |
| Cochran-Helton-Lindley House |
| Cole-Evans House |
| Cole, James Omar, House |
| Cole, Joseph J., Jr., House |
| Cole Motor Car Company |
| Colfax Carnegie Library |
| Collett Park |
| Collett Park Neighborhood Historic District |
| Collier Lodge Site |
| Collin's Ford Bridge |
| Collins School |
| Colman-Doctor Farm |
| Colonial |
| Colonial Gardens Commercial Historic District |
| Colored Knights of Pythias Castle Hall |
| Columbia City Historic District |
| Columbia Club |
| Columbus City Hall |
| Combs Addition Historic District |
| Commercial Building |
| Condon, Charles H. and Emma, House |
| Conn, Charles Gerard, Mansion |
| Conner's Bookstore |
| Conner Street Historic District |
| Connersville Downtown Historic District |
Data from United States Park Service and Wikidata
