| Country | Exchange rates |
| Congo, Republic of the |  Cooperation Financiere en Afrique Centrale francs per US dollar - 473.7 (2011 est.) 495.28 (2010 est.) 472.19 (2009) 447.81 (2008) 483.6 (2007) |
| Cook Islands |  NZ dollars (NZD) per US dollar - 1.266 (2011) 1.3874 (2010) 1.6002 (2009) 1.3811 (2007) |
| Coral Sea Islands | void |
| Costa Rica |  Costa Rican colones (CRC) per US dollar - 503.5 (2011 est.) 525.83 (2010 est.) 573.29 (2009) 530.41 (2008) 519.53 (2007) |
| Cote d'Ivoire |  Communaute Financiere Africaine francs (XOF) per US dollar - 465.2 (2011 est.) 495.28 (2010 est.) 472.19 (2009) 447.81 (2008) 481.83 (2007) |
| Croatia |  kuna (HRK) per US dollar - 5.25 (2011 est.) 5.4779 (2010 est.) 5.2692 (2009) 4.98 (2008) 5.3735 (2007) |
| Cuba |  Cuban pesos (CUP) per US dollar - 0.9847 (2011 est.) 0.9259 (2010 est.) 0.9259 (2009) 0.9259 (2008) 0.9259 (2007) |
| Curacao |  Netherlands Antillean guilders (ANG) per US dollar - 1.79 (2011 est.) 1.79 (2010 est.) 1.79 (2009) 1.79 (2008) 1.79 (2007) |
| Cyprus |  euros (EUR) per US dollar - 0.7107 (2011 est.) 0.755 (2010 est.) 0.7198 (2009 est.) 0.6827 (2008 est.) note:: 0.7345 (2007 est.) |
| Czech Republic |  koruny (CZK) per US dollar - 17.25 (2011 est.) 19.098 (2010 est.) 19.063 (2009) 17.064 (2008) 20.53 (2007) |
| Denmark |  Danish kroner (DKK) per US dollar - 5.291 (2011 est.) 5.624 (2010 est.) 5.361 (2009) 5.0236 (2008) 5.4797 (2007) |
| Dhekelia | note: uses the euro |
| Djibouti |  Djiboutian francs (DJF) per US dollar - 177.7 (2011 est.) 177.72 (2010 est.) |
| Dominica |  East Caribbean dollars (XCD) per US dollar - 2.7 (2011 est.) 2.7 (2010 est.) 2.7 (2009)
|