Slovenia:
AM 17, FM 160, shortwave 0 (1998)
Solomon Islands:
AM 3, FM 0, shortwave 0 (1998)
Somalia:
AM 0, FM 0, shortwave 4 (1988)
South Africa:
AM 14, FM 347 (plus 243 repeaters), shortwave 1 (1998)
South Georgia and the South Sandwich Islands:
none
Spain:
AM 208, FM 715, shortwave 1 (1998)
Sri Lanka:
AM 26, FM 45, shortwave 1 (1998)
Sudan:
AM 12, FM 1, shortwave 1 (1998)
Suriname:
AM 4, FM 13, shortwave 1 (1998)
Svalbard:
AM 1, FM 1 (plus 2 repeaters), shortwave 0 (1998)