| Rank | Country | Maritime claims |
| Cameroon | territorial sea: 12 nm
contiguous zone: 24 nm |
| Canada | territorial sea: 12 nm
contiguous zone: 24 nm
exclusive economic zone: 200 nm
continental shelf: 200 nm or to the edge of the continental margin |
| Cape Verde | measured from claimed archipelagic baselines
territorial sea: 12 nm
contiguous zone: 24 nm
exclusive economic zone: 200 nm |
| Cayman Islands | territorial sea: 12 nm
exclusive fishing zone: 200 nm |
| Central African Republic | none (landlocked) |
| Chad | none (landlocked) |
| Chile | territorial sea: 12 nm
contiguous zone: 24 nm
exclusive economic zone: 200 nm
continental shelf: 200/350 nm |
| China | territorial sea: 12 nm
contiguous zone: 24 nm
exclusive economic zone: 200 nm
continental shelf: 200 nm or to the edge of the continental margin |
| Christmas Island | territorial sea: 12 nm
contiguous zone: 12 nm
exclusive fishing zone: 200 nm |
| Clipperton Island | territorial sea: 12 nm
exclusive economic zone: 200 nm |
| Cocos (Keeling) Islands | territorial sea: 12 nm
exclusive fishing zone: 200 nm |
| Colombia | 
territorial sea: 12 nm
exclusive economic zone: 200 nm
continental shelf: 200 m depth or to the depth of exploitation |
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