San Julián (Saint Julian) may refer to:

• San Julián, Sonsonate, El Salvador
• San Julián, Jalisco, Mexico
• San Julian, Eastern Samar, Philippines
• Puerto San Julián, Patagonia, Santa Cruz Province (Argentina)
• San Julián, Santa Cruz, Bolivia
• San Julián (Chile), Chile
• San Julián (mountain), a mountain in the Andes of Peru.
• San Julián, an air base in Cuba.
• Las Ventas de San Julián, municipality located in the province of Toledo