136 selected
- Saar-Buckenheim
- Saargemünd
- Saarland
- SADR (Sahrawi Arab Democratic Republic)
- Sagan
- Sahrawi Arab Democratic Republic (SADR)
- Saint Helena
- Saint Helena and Ascension
- Saint Kitts & Nevis
- Saint Lucia
- Saint Thomas and Prince
- Saint Vincent
- Saint-André de l'Eure
- Saint-Gaudens
- Saint-Germain-en-Laye
- Saint-Pierre and Miquelon
- Saksen-Alt-Gotha
- Salzburg
- Samoa
- Samudera-Pasai
- San Luis Potosi
- San Marino
- Sandau
- Sangerhausen
- Sankt Gallen
- Sannois
- Santander, Palencia and Burgos
- Sarawak
- Sardinia
- Sassanian Empire (Sassanid Empire)
- Sassanid Empire (Sassanian Empire)
- Satavahana
- Saudi Arabia
- Savoy
- Saxe-Altenburg
- Saxe-Ernestine
- Saxe-Hildburghausen
- Saxe-Meiningen
- Saxe-Weimar-Eisenach
- Saxony
- Saxony-Albertine
- Saxony-Coburg-Gotha
- Saxony-Coburg-Saalfeld
- Saxony-Gotha-Altenburg
- Sayn-Altenkirchen
- Sayn-Wittgenstein-Wittgenstein
- Schaumburg-Hessen
- Schaumburg-Lippe
- Scheinfeld
- Schleswig-Holstein
- Schmalkalden
- Schmölln
- Schwäbisch Hall
- Schwarzburg-Rudolstadt
- Schwarzburg-Sondershausen
- Schweidnitz
- Schwerin an der Warthe
- Schwyz
- Scotland
- Segarra de Gaia
- Selb
- Seleucid Empire
- Senegal
- Serbia
- several countries
- Seychelles
- Shandong
- Shanxi
- Sharjah
- Shensi
- Siberia
- Sichuan
- Sicily
- Siegen
- Sierra Leone
- Sikh Empire
- Silesia
- Silesia-Liegnitz-Brieg
- Sindh
- Singapore
- Sinsheim
- Sinzig
- Sion (Sitten)
- Sitten (Sion)
- Skandagupta
- Slavonia
- Sleswig-Holstein-Gottorp
- Slovakia
- Slovenia
- Soest
- Solingen
- Solms-Lich
- Solomon Islands
- Solothurn
- Somalia
- Somaliland
- Sonthofen
- South Africa
- South Arabia
- South Georgia and the South Sandwich Islands
- South Korea
- South Sudan
- South-Peru
- Southern Rhodesia
- Spain
- Spandau
- Spanish Netherlands
- Speyer
- Spitzbergen
- Spremberg
- Sri Lanka
- Stadtamhof
- Stadtlengsfeld
- Stavelot
- Sterkrade
- Stettin
- Stevensweert
- Stolberg-Rossla
- Stolberg-Stolberg
- Stoltenhoff Island
- Straits Settlements
- Stralsund
- Strasbourg
- Sudan
- Suhl
- Sulawesi (Celebes)
- Sultana
- Sumatra
- Surinam (Suriname)
- Suriname (Surinam)
- Swaziland (Eswatini)
- Sweden
- Swinemünde
- Switzerland
- Syria
- Szechuan-Shensi Sovjet
- Not filled in