Vallejo can refer to:

• Vallejo, California
• Vallejo (band)
• Boris Vallejo, a Peruvian-born American painter
• César Vallejo, a Peruvian-born Spanish poet.
• Mariano Guadalupe Vallejo, a Californian politician and general.
• Antonio Buero Vallejo, a playwright, the author of "Un Soñador Para Un Pueblo".