32 selected
- Not filled in
- Saint Helena
- Saint Pierre et Miquelon
- Saint Thomas and Prince
- Samoa (Western Samoa)
- San Marino
- São Tomé and Príncipe
- Saudi Arabia
- Scotland
- Senegal
- Serbia
- Seychelles
- Sierra Leone
- Singapore
- Slovakia
- Slovenia
- Solomon Islands
- Somalia
- Somaliland
- South Korea
- South Sudan
- South Vietnam (1955 – 1975)
- Spain
- Spitsbergen (Svalbard)
- Sri Lanka
- Straits Settlements
- Sudan
- Suriname
- Svalbard (Spitsbergen)
- Swaziland
- Sweden
- Switzerland
- Syria