| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Cabezón de Cameros | city | La Rioja | Spain | 42.20 | -2.52 | 3530 | 281 |
| Cabretón | city | La Rioja | Spain | 42.00 | -1.91 | 1669 | 1958 |
| Calagorra | city | La Rioja | Spain | 42.31 | -1.97 | 1010 | 15536 |
| Calagurris | city | La Rioja | Spain | 42.31 | -1.97 | 1010 | 15536 |
| Calahorra | city | La Rioja | Spain | 42.31 | -1.97 | 1010 | 15536 |
| Camproviín | city | La Rioja | Spain | 42.35 | -2.72 | 2509 | 4310 |
| Canales | city | La Rioja | Spain | 42.14 | -3.02 | 3681 | 191 |
| Canales de la Sierra | city | La Rioja | Spain | 42.14 | -3.02 | 3681 | 191 |
| Canillas de Río Tuerto | city | La Rioja | Spain | 42.40 | -2.84 | 1984 | 2153 |
| Carbonera | city | La Rioja | Spain | 42.28 | -2.18 | 2700 | 782 |
| Casalareina | city | La Rioja | Spain | 42.55 | -2.91 | 1669 | 6382 |
| Casalarreina | city | La Rioja | Spain | 42.55 | -2.91 | 1669 | 6382 |
| Castanares | city | La Rioja | Spain | 42.51 | -2.93 | 1745 | 2813 |
| Castanares de Rioja | city | La Rioja | Spain | 42.51 | -2.93 | 1745 | 2813 |
| Castanares de las Cuevas | city | La Rioja | Spain | 42.31 | -2.55 | 2509 | 772 |
| Castilseco | city | La Rioja | Spain | 42.61 | -2.96 | 1856 | 6790 |
| Castroviejo | city | La Rioja | Spain | 42.33 | -1.65 | 1089 | 2277 |
| Cañas | city | La Rioja | Spain | 42.39 | -2.85 | 2093 | 1878 |
| Cellorigo | city | La Rioja | Spain | 42.63 | -3.00 | 1906 | 7178 |
| Cenicero | city | La Rioja | Spain | 42.48 | -2.64 | 1669 | 5285 |
| Ceracero | city | La Rioja | Spain | 42.48 | -2.64 | 1669 | 5285 |
| Cervera de Rio Alhama | city | La Rioja | Spain | 42.01 | -1.96 | 1975 | 1681 |
| Cervera del Rio Alhama | city | La Rioja | Spain | 42.01 | -1.96 | 1975 | 1681 |
| Cervera del Rio Alhambra | city | La Rioja | Spain | 42.01 | -1.96 | 1975 | 1681 |
| Cidamón | city | La Rioja | Spain | 42.50 | -2.88 | 1955 | 2346 |
| Cihuri | city | La Rioja | Spain | 42.56 | -2.92 | 1669 | 6162 |
| Cilbarrena | city | La Rioja | Spain | 42.31 | -3.00 | 4189 | 992 |
| Cillarrena | city | La Rioja | Spain | 42.31 | -3.00 | 4189 | 992 |
| Ciriñuela | city | La Rioja | Spain | 42.42 | -2.89 | 2509 | 2885 |
| Cirueña | city | La Rioja | Spain | 42.41 | -2.90 | 2509 | 2857 |
| Clavijo | city | La Rioja | Spain | 42.35 | -2.43 | 2509 | 3553 |
| Clavillo | city | La Rioja | Spain | 42.35 | -2.43 | 2509 | 3553 |
| Cordovin | city | La Rioja | Spain | 42.39 | -2.82 | 1929 | 3960 |
| Corera | city | La Rioja | Spain | 42.34 | -2.22 | 1686 | 1293 |
| Cornago | city | La Rioja | Spain | 42.06 | -2.09 | 2509 | 633 |
| Corporales | city | La Rioja | Spain | 42.43 | -3.00 | 2509 | 4873 |
| Cuzcurrita de Río Tirón | city | La Rioja | Spain | 42.54 | -2.96 | 1797 | 2065 |
| Cuzcurrita-Rio Tiron | city | La Rioja | Spain | 42.54 | -2.96 | 1797 | 2065 |
| Cárdenas | city | La Rioja | Spain | 42.37 | -2.77 | 1817 | 6935 |