Singapore - Civil Ensign
Singapore - Naval Ensign
Singapore - Presidential Standard
Singapore - State Ensign
Sint Maarten
Sisak-Moslavina County
Sliema
Slovakia
Slovenia
Slovenia - Army Flag
Sochi
Solomon Islands - Civil Ensign
Solomon Islands - Naval Ensign
Solothurn
Sorbs
South Africa
South Africa - Naval Ensign
South Georgia and South Sandwich Islands...
South Korea
South Sudan
Sri Lanka - Naval Ensign
Srpska (Republic of)
St. Eustatius
Subcarpathian Voivodeship
