| Country | Disputes |
|---|
| Saint Helena | none |
| Saint Kitts and Nevis | joins other Caribbean states to counter Venezuela's claim that Aves Island sustains human habitation, a criterion under UNCLOS, which permits Venezuela to extend its EEZ/continental shelf over a large portion of the Caribbean Sea |
| Saint Lucia | joins other Caribbean states to counter Venezuela's claim that Aves Island sustains human habitation, a criterion under UNCLOS, which permits Venezuela to extend its EEZ/continental shelf over a large portion of the Caribbean Sea |
| Saint Pierre and Miquelon | none |
| Saint Vincent and the Grenadines | joins other Caribbean states to counter Venezuela's claim that Aves Island sustains human habitation, a criterion under UNCLOS, which permits Venezuela to extend its EEZ/continental shelf over a large portion of the Caribbean Sea |
| Samoa | none |
| San Marino | none |
| Sao Tome and Principe | none |
| Saudi Arabia | nomadic groups on border region with Yemen resist demarcation of boundary; Yemen protests Saudi erection of a concrete-filled pipe as a security barrier in 2004 to stem illegal cross-border activities in sections of the boundary; Kuwait and Saudi Arabia continue discussions on a maritime boundary with Iran; because the treaties have not been made public, the exact alignment of the boundary with the UAE is still unknown and labeled approximate |
| Senegal | The Gambia and Guinea-Bissau attempt to stem refugees, cross border raids, arms smuggling, and political instability from a separatist movement in Senegal's Casamance region |
| Serbia and Montenegro | the future status of Kosovo remains an unresolved issue in South Central Europe with Kosovo Albanians overwhelmingly supporting and Serbian officials opposing Kosovo independence; the international community has agreed to begin a process to determine final status only after significant progress has been made in solidifying multi-ethnic democracy in Kosovo as outlined in the policy of "standards before status"; the Contact group (including the US, UK, France, Germany, Italy, and Russia) will review progress on the UNMIK standard around mid-2005; ethnic Albanians in Kosovo resist demarcation of the F.Y.R.O.M. boundary in accordance with the 2000 delimitation treaty, which transfers on net a small amount of land to F.Y.R.O.M.; Serbia and Montenegro have delimited about half of the boundary with Bosnia and Herzegovina, but sections along the Drina River remain in dispute |
| Seychelles | together with Mauritius, Seychelles claims the Chagos Archipelago (UK-administered British Indian Ocean Territory) |
| Sierra Leone | domestic fighting among disparate rebel groups, warlords, and youth gangs in Guinea, Liberia, and Sierra Leone have created insurgencies, street violence, looting, arms trafficking, ethnic conflicts, and refugees in border areas; in 2003, Guinea and Sierra Leone established a boundary commission to resolve a dispute over the town of Yenga |
| Singapore | disputes with Malaysia over deliveries of fresh water to Singapore, Singapore's land reclamation works, bridge construction, maritime boundaries, and Pedra Branca Island/Pulau Batu Putih persist - parties agree to ICJ arbitration on island dispute within three years |
| Slovakia | Hungary amended its status law extending special social and cultural benefits to ethnic Hungarians in Slovakia, many of whom had protested the law; Slovakia and Hungary have renewed discussions on ways to resolve differences over the Gabcikovo-Nagymaros hydroelectric dam on the Danube, with possible resort again to the ICJ for final resolution |
| Slovenia | the Croatia-Slovenia land and maritime boundary agreement, which would have ceded most of Piran Bay and maritime access to Slovenia and several villages to Croatia, remains controversial, has not been ratified, and has been complicated by Croatia's declaration of an ecological-fisheries zone in the Adriatic Sea |
| Solomon Islands | Australian defense personnel are dispatched at the invitation of the Solomon Islands' Government to restore law and order on the islands and reinforce regional security |
| Somalia | "Somaliland" secessionists provide port facilities to land-locked Ethiopia and establish commercial ties with regional states; "Puntland" secessionists clash with "Somaliland" secessionists to establish territorial limits and clan loyalties, each seeking support from neighboring states; Ethiopia maintains only an administrative line with the Oromo region of southern Somalia and maintains alliances with local Somali clans opposed to the unrecognized Transitional National Government in Mogadishu |
| South Africa | managed dispute with Namibia over the location of the boundary in the Orange River |
| South Georgia and the South Sandwich Islands | briefly occupied by military force in 1982 - claimed by Argentina in constitution but declares it will no longer seek settlement by force |
| Southern Ocean | Antarctic Treaty defers claims (see Antarctica entry), but Argentina, Australia, Chile, France, NZ, Norway, and UK assert claims (some overlapping), including the continental shelf in the Southern Ocean; several states have expressed an interest in extending those continental shelf claims under the United Nations Convention on the Law of the Sea (UNCLOS) to include undersea ridges; the US and most other states do not recognize the land or maritime claims of other states and have made no claims themselves (the US and Russia have reserved the right to do so); no formal claims have been made in the sector between 90 degrees west and 150 degrees west |
| Spain | since Gibraltar residents voted overwhelmingly by referendum in 2003 against a "total shared sovereignty" arrangement, talks between the UK and Spain over the fate of the 300-year old UK colony have stalled; Spain disapproves of UK plans to grant Gibraltar greater autonomy; Morocco protests Spain's control over the coastal enclaves of Ceuta, Melilla, and the islands of Penon de Velez de la Gomera, Penon de Alhucemas and Islas Chafarinas, and surrounding waters; Morocco serves as the primary launching area of illegal migration into Spain from North Africa; Morocco rejected Spain's unilateral designation of a median line from the Canary Islands in 2002 to set limits to undersea resource exploration and refugee interdiction, but agreed in 2003 to discuss a comprehensive maritime delimitation; some Portuguese groups assert dormant claims to territories ceded to Spain around the town of Olivenza |
| Spratly Islands | all of the Spratly Islands are claimed by China, Taiwan, and Vietnam; parts of them are claimed by Malaysia and the Philippines; in 1984, Brunei established an exclusive fishing zone that encompasses Louisa Reef in the southern Spratly Islands but has not publicly claimed the reef; claimants in November 2002 signed the "Declaration on the Conduct of Parties in the South China Sea," which has eased tensions but falls short of a legally binding "code of conduct" |
| Sri Lanka | none |
| Sudan | the north-south civil war has affected Sudan's neighbors by drawing them into the fighting and by forcing them to provide shelter to refugees, to contend with infiltration by rebel groups, and to serve as mediators; Sudan has provided shelter to Ugandan refugees and cover to Lord's Resistance Army soldiers; Sudan accuses Eritrea of supporting Sudanese rebel groups; efforts to demarcate the porous boundary with Ethiopia have been delayed by fighting in Sudan; Kenya's administrative boundary still extends into the Sudan, creating the "Ilemi Triangle"; Egypt and Sudan retain claims to administer the triangular areas that extend north and south of the 1899 Treaty boundary along the 22nd Parallel, but have withdrawn their military presence; Egypt is economically developing and currently effectively administers the "Hala'ib Triangle" north of the Treaty Line; Sudan has pledged to work with the Central African Republic to stem violent skirmishes over water and grazing among related pastoral populations along the bo |
| Suriname | area claimed by French Guiana between Riviere Litani and Riviere Marouini (both headwaters of the Lawa); Suriname claims a triangle of land between the New and Kutari/Koetari Rivers in a historic dispute over the headwaters of the Courantyne; Guyana seeks UNCLOS arbitration to resolve the long-standing dispute with Suriname over the axis of the territorial sea boundary in potentially oil-rich waters |
| Svalbard | despite recent discussions, Russia and Norway dispute their maritime limits in the Barents Sea and Russia's fishing rights beyond Svalbard's territorial limits within the Svalbard Treaty zone |
| Swaziland | none |
| Sweden | none |
| Switzerland | none |
| Syria | Golan Heights is Israeli-occupied; Lebanon claims Shaba'a farms in Golan Heights; Syrian troops have been stationed in Lebanon since October 1976; Syria protests Turkish hydrological projects regulating upper Euphrates waters |
