Solomon Islands
parliamentary democracy and a Commonwealth realm

Somalia
no permanent national government; transitional,
parliamentary federal government

South Africa
republic

Spain
parliamentary monarchy

Sri Lanka
republic

Sudan
Government of National Unity (GNU) - the National Congress
Party (NCP) and Sudan People's Liberation Movement (SPLM) formed a
power-sharing government under the 2005 Comprehensive Peace
Agreement (CPA); the NCP, which came to power by military coup in
1989, is the majority partner; the agreement stipulated national
elections in 2009, but these were subsequently rescheduled for April
2010

Suriname
constitutional democracy

Svalbard
NA

Swaziland
monarchy

Sweden
constitutional monarchy