Baja is:

• Baja California peninsula, a peninsula in North America
• Baja California and Baja California Sur, states of Mexico
• Baja, a city in Hungary
• Baja Verapaz, a department of Guatemala
• Subaru Baja, a car manufactured by Subaru
• Baja 1000, an off road race.
• Baja bug, a type of car made by adaptation of a Volkswagen Beetle. This type originates from the Baja 1000.