S

      • Saar
      • Samoa
      • San Marino
      • Santander
      • Sarawak
      • Sardinia
      • Saxe-Altenburg
      • Saudi Arabia
      • Saxony
      • Schleswig-Holstein
      • Selangor
      • Senegal
      • Senegambia and Niger
      • Serbian Occupation of Hungary
      • Seychelles
      • Shanghai
      • Sharjah
      • Siberia
      • Sicily
      • Sierra Leone
      • Singapore
      • Sirmoor
      • Sleeswig
      • Slovakia
      • Slovenia
      • Solomon Islands
      • Somaliland
      • Somaliland Protectorate
      • South Arabia
      • South Arabian Federation
      • South Africa
      • South Australia
      • South Georgia & South Sandwich Islands
      • South Kasai
      • South Russia
      • Southern Africa
      • Southern Nigeria
      • Southern Rhodesia
      • Southern Yemen
      • Spain
      • Spanish Guinea
      • Spanish Morocco
      • Spanish Post Offices in Tangier
      • Spanish Sahara
      • Spanish West Africa
      • Sri Lanka
      • Thomas & Prince Island
      • St. Christopher
      • St. Helena
      • St. Kitts
      • St. Kitts-Nevis
      • St. Lucia
      • St. Pierre Et Miquelon
      • St. Vincent
      • Marie De Madagascar
      • Stellaland
      • Straits Settlements
      • Sudan
      • Sungai Ujong
      • Surinam
      • Swaziland
      • Sweden
      • Switzerland
      • Syria