| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Rio Cacatu | city | Parana | Brazil | -25.32 | -48.75 | 354 | 1510 |
| Rio Cacatu | city | Parana | Brazil | -25.34 | -48.74 | 170 | 1467 |
| Rio Cachorros | city | Santa Catarina | Brazil | -27.40 | -50.48 | 3349 | 1207 |
| Rio Calçado | city | Espirito Santo | Brazil | -20.55 | -40.57 | 1125 | 15347 |
| Rio Capinzal | city | Santa Catarina | Brazil | -27.33 | -51.60 | 2030 | 21286 |
| Rio Carolina | city | Santa Catarina | Brazil | -28.13 | -49.05 | 830 | 1081 |
| Rio Cartente | city | Minas Gerais | Brazil | -19.02 | -42.12 | 862 | 6767 |
| Rio Casca | city | Minas Gerais | Brazil | -20.17 | -42.64 | 1164 | 5008 |
| Rio Casca | city | Mato Grosso | Brazil | -15.45 | -55.35 | 2509 | 27 |
| Rio Caçador | city | Santa Catarina | Brazil | -26.78 | -51.00 | 3349 | 33366 |
| Rio Cedro Médio | city | Santa Catarina | Brazil | -28.72 | -49.58 | 324 | 707 |
| Rio Cinzas | city | Parana | Brazil | -23.45 | -50.28 | 1938 | 2031 |
| Rio Claro | city | Parana | Brazil | -25.93 | -50.68 | 2526 | 1686 |
| Rio Claro | city | Parana | Brazil | -25.78 | -53.75 | 1256 | 4507 |
| Rio Claro | city | Parana | Brazil | -23.65 | -52.22 | 977 | 4388 |
| Rio Claro | city | Rio de Janeiro | Brazil | -22.72 | -44.14 | 1853 | 10830 |
| Rio Claro | city | Minas Gerais | Brazil | -22.42 | -45.27 | 5029 | 3886 |
| Rio Claro | city | Sao Paulo | Brazil | -22.41 | -47.56 | 2001 | 91404 |
| Rio Claro | city | Mato Grosso | Brazil | -16.67 | -56.80 | 370 | 0 |
| Rio Claro | city | Goias | Brazil | -16.30 | -50.90 | 1669 | 843 |
| Rio Claro | city | Sao Paulo | Brazil | -24.62 | -48.89 | 997 | 1647 |
| Rio Claro do Sul | city | Parana | Brazil | -25.93 | -50.68 | 2526 | 1686 |
| Rio Comprido | city | Rio de Janeiro | Brazil | -22.92 | -43.20 | 360 | 429335 |
| Rio Corrente | city | Parana | Brazil | -25.51 | -50.72 | 3349 | 7661 |
| Rio Corrente | city | Parana | Brazil | -25.48 | -50.71 | 3349 | 12721 |
| Rio Corrente Primeiro | city | Parana | Brazil | -25.51 | -50.73 | 3349 | 6035 |
| Rio Corrente Segundo | city | Parana | Brazil | -25.50 | -50.72 | 3349 | 11886 |
| Rio Corrente dos Pedrosos | city | Parana | Brazil | -25.54 | -50.74 | 3349 | 2911 |
| Rio Correntes | city | Santa Catarina | Brazil | -27.08 | -50.63 | 3349 | 1431 |
| Rio Crespo | city | Rondonia | Brazil | -9.75 | -62.88 | 830 | 3256 |
| Rio Curupahy | city | Mato Grosso do Sul | Brazil | -22.83 | -53.88 | 990 | 298 |