| Rank | Country | Land boundaries |
| Clipperton Island | 0 km |
| Cocos (Keeling) Islands | 0 km |
18 | Colombia | total: 6,309 km border countries: Brazil 1,644 km, Ecuador 590 km, Panama 225 km, Peru 1,800 km, Venezuela 2,050 km |
| Comoros | 0 km |
7 | Congo, Democratic Republic of the | total: 10,730 km border countries: Angola 2,511 km (of which 225 km is the boundary of Angola's discontiguous Cabinda Province), Burundi 233 km, Central African Republic 1,577 km, Republic of the Congo 2,410 km, Rwanda 217 km, South Sudan 628 km, Tanzania 459 km, Uganda 765 km, Zambia 1,930 km |
25 | Congo, Republic of the | total: 5,504 km border countries: Angola 201 km, Cameroon 523 km, Central African Republic 467 km, Democratic Republic of the Congo 2,410 km, Gabon 1,903 km |
| Cook Islands | 0 km |
| Coral Sea Islands | 0 km |
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This page was last updated on 2 February, 2012 |
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