Sankt Johann (German for "Saint John") may refer to the following places:

• St. Johann (Reutlingen), a municipality in the district of Reutlingen, Baden-Württemberg
• Sankt Johann, Mainz-Bingen, a municipality in the district Mainz-Bingen, Rhineland-Palatinate
• Sankt Johann, Mayen-Koblenz, a municipality in the district Mayen-Koblenz, Rhineland-Palatinate
• Sankt Johann (Saarbrücken), a borough of Saarbrücken, Saarland

• Sankt Johann im Pongau, in the state of Salzburg
• in Styria:
  • Sankt Johann am Tauern
  • Sankt Johann bei Herberstein
  • Sankt Johann im Saggautal
  • Sankt Johann in der Haide
  • Sankt Johann-Köppling
• Sankt Johann in Tirol, in Tyrol
• Sankt Johann im Walde, in Tyrol
• Sankt Johann am Walde, in Upper Austria
• Sankt Johann am Wimberg, in Upper Austria

• Alt St. Johann, in the Canton of St. Gallen
• St. Johann, Schaffhausen, in the city of Schaffhausen

• San Giovanni (disambiguation)
• Saint-Jean (disambiguation)
• Saint John (disambiguation)
• Saint Juan (disambiguation)
• Sant Joan (disambiguation)
• San Juan (disambiguation)
• São João (disambiguation)