| Rank | Country | Maritime claims |
| Romania | territorial sea: 12 nm contiguous zone: 24 nm exclusive economic zone: 200 nm continental shelf: 200-m depth or to the depth of exploitation |
| Russia | territorial sea: 12 nm contiguous zone: 24 nm exclusive economic zone: 200 nm continental shelf: 200-m depth or to the depth of exploitation |
| Rwanda | none (landlocked) |
| Saint Barthelemy | void |
| Saint Helena | territorial sea: 12 nm exclusive fishing zone: 200 nm |
| Saint Kitts and Nevis | 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 |
| Saint Lucia | 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 |
| Saint Martin | void |
| Saint Pierre and Miquelon | territorial sea: 12 nm exclusive economic zone: 200 nm |
| Saint Vincent and the Grenadines | territorial sea: 12 nm contiguous zone: 24 nm exclusive economic zone: 200 nm continental shelf: 200 nm |
| Samoa | territorial sea: 12 nm contiguous zone: 24 nm exclusive economic zone: 200 nm |
| San Marino | none (landlocked) |
| Sao Tome and Principe | measured from claimed archipelagic baselines territorial sea: 12 nm exclusive economic zone: 200 nm |
| Saudi Arabia | territorial sea: 12 nm contiguous zone: 18 nm continental shelf: not specified |
| Senegal | 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 |
| Serbia | none (landlocked) |
| Seychelles | 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 |
| Sierra Leone | territorial sea: 12 nm contiguous zone: 24 nm exclusive economic zone: 200 nm continental shelf: 200 nm |
| Singapore | territorial sea: 3 nm exclusive fishing zone: within and beyond territorial sea, as defined in treaties and practice |
| Slovakia | none (landlocked) |
| Slovenia | territorial sea: 12 nm |
| Solomon Islands | measured from claimed archipelagic baselines territorial sea: 12 nm exclusive economic zone: 200 nm continental shelf: 200 nm |
| Somalia | territorial sea: 200 nm |
| South Africa | territorial sea: 12 nm contiguous zone: 24 nm exclusive economic zone: 200 nm continental shelf: 200 nm or to edge of the continental margin |