San Juan, the Spanish for Saint John, is a common toponym in parts of the world where Spanish is or was spoken:
- Mexico
- San Juan, Campeche
- San Juan, Chihuahua
- San Juan, Coahuila
- San Juan, San Luis Potosí
- San Juan, Sonora
Additional uses:
- San Juan by Andreas Seyfarth : A card game for three to four players.