San Justo
San Justo is the Spanish name for Saint Justus.
As a place-name, San Justo may refer to:
- San Justo, Santa Fe— main township of the San Justo Department, Argentina
- San Justo Department (disambiguation), various places
- San Justo, Buenos Aires— town in La Matanza Partido, Argentina
- San Justo, Entre Ríos— town in Entre Ríos, Argentina
- San Justo, Zamora— municipality in the province of Zamora, Spain