Princes | Titles by Rank
- Princes of Schwarzburg-Sondershausen
- Princes of Scilla
- Princes of Scordia
- Princes of Scotland
- Princes of Sedan
- Princes of Serra di Gerace
- Princes of Sérvia
- Princes of Sicília
- Princes of Siebenbürgen
- Princes of Sirignano
- Princes of Sismano
- Princes of Smolensk
- Princes of Solms-Baruth
- Princes of Solms-Braunfels
- Princes of Solms-Hohensolms-Lich
- Princes of Solofra
- Princes of Solre
- Princes of Sonnino
- Princes of Soriano
- Princes of Soubise
- Princes of Soutzo
- Princes of Spada
- Princes of Spadafora
- Princes of Sperlinga dei Manganelli
- Princes of Squillace
- Princes of Starhemberg
- Princes of Stigliano
- Princes of Stolberg-Gedern
- Princes of Stolberg-Gedern-Ortenberg
- Princes of Stolberg-Rossla
- Princes of Stolberg-Stolberg
- Princes of Stolberg-Wernigerode
- Princes of Striano
- Princes of Strongoli
- Princes of Sulmona
- Princes of Sulzbach
- Princes of Summonte
- Princes of Sweden
- Princes of Talleyrand-Perigord
- Princes of Talmond
- Princes of Taranto
- Princes of Tarento
- Princes of Taron
- Princes of Taurien
- Princes of Teora
- Princes of Termoli
- Princes of the Holy Roman Empire
- Princes of the Netherlands
- Princes of the Two Sicilies
- Princes of Thiano