| Country | Capital |
| Cocos (Keeling) Islands | name: West Island geographic coordinates: 12 10 S, 96 50 E time difference: UTC+6.5 (11.5 hours ahead of Washington, DC during Standard Time) |
| Colombia | name: Bogota geographic coordinates: 4 36 N, 74 05 W time difference: UTC-5 (same time as Washington, DC during Standard Time) |
| Comoros | name: Moroni geographic coordinates: 11 42 S, 43 14 E time difference: UTC+3 (8 hours ahead of Washington, DC during Standard Time) |
| Congo, Democratic Republic of the | name: Kinshasa geographic coordinates: 4 19 S, 15 18 E time difference: UTC+1 (six hours ahead of Washington, DC during Standard Time) |
| Congo, Republic of the | name: Brazzaville geographic coordinates: 4 15 S, 15 17 E time difference: UTC+1 (six hours ahead of Washington, DC during Standard Time) |
| Cook Islands | name: Avarua geographic coordinates: 21 12 S, 159 46 W time difference: UTC-10 (5 hours behind Washington, DC during Standard Time) |
| Coral Sea Islands | void |
| Costa Rica | name: San Jose geographic coordinates: 9 56 N, 84 05 W time difference: UTC-6 (1 hour behind Washington, DC during Standard Time) |
| Cote d'Ivoire | name: Yamoussoukro geographic coordinates: 6 49 N, 5 17 W time difference: UTC 0 (5 hours ahead of Washington, DC during Standard Time) note: although Yamoussoukro has been the official capital since 1983, Abidjan remains the commercial and administrative center; the US, like other countries, maintains its Embassy in Abidjan |
| Croatia | name: Zagreb geographic coordinates: 45 48 N, 16 00 E time difference: UTC+1 (6 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| Cuba | name: Havana geographic coordinates: 23 07 N, 82 21 W time difference: UTC-5 (same time as Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| Cyprus | name: Nicosia (Lefkosia) geographic coordinates: 35 10 N, 33 22 E time difference: UTC+2 (7 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| Czech Republic | name: Prague geographic coordinates: 50 05 N, 14 28 E time difference: UTC+1 (6 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| Denmark | name: Copenhagen geographic coordinates: 55 40 N, 12 35 E time difference: UTC+1 (6 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October note: applies to continental Denmark only, not to the North Atlantic components |
| Dhekelia | name: Episkopi Cantonment (base administrative center for Akrotiri and Dhekelia); located in Akrotiri geographic coordinates: 34 40 N, 32 51 E time difference: UTC+2 (7 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| Djibouti | name: Djibouti geographic coordinates: 11 35 N, 43 09 E time difference: UTC+3 (8 hours ahead of Washington, DC during Standard Time) |
| Dominica | name: Roseau geographic coordinates: 15 18 N, 61 24 W time difference: UTC-4 (1 hour ahead of Washington, DC during Standard Time) |
| Dominican Republic | name: Santo Domingo geographic coordinates: 18 28 N, 69 54 W time difference: UTC-4 (1 hour ahead of Washington, DC during Standard Time) |
| Ecuador | name: Quito geographic coordinates: 0 13 S, 78 30 W time difference: UTC-5 (same time as Washington, DC during Standard Time) |
| Egypt | name: Cairo geographic coordinates: 30 03 N, 31 15 E time difference: UTC+2 (7 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Friday in April; ends last Thursday in September |
| El Salvador | name: San Salvador geographic coordinates: 13 42 N, 89 12 W time difference: UTC-6 (1 hour behind Washington, DC during Standard Time) |
| Equatorial Guinea | name: Malabo geographic coordinates: 3 45 N, 8 47 E time difference: UTC+1 (6 hours ahead of Washington, DC during Standard Time) |
| Eritrea | name: Asmara (Asmera) geographic coordinates: 15 20 N, 38 56 E time difference: UTC+3 (8 hours ahead of Washington, DC during Standard Time) |
| Estonia | name: Tallinn geographic coordinates: 59 26 N, 24 43 E time difference: UTC+2 (7 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| Ethiopia | name: Addis Ababa geographic coordinates: 9 02 N, 38 42 E time difference: UTC+3 (8 hours ahead of Washington, DC during Standard Time) |