Ensenada is a municipality in the Mexican state of Baja California. It is the fourth-largest municipality in the country, with a land area of 19,526.8 km2 (7,539.3 sq mi) in 2020, making slightly smaller than the state of Hidalgo and larger than five other Mexican states.

Municipalities are the second-level administrative divisions of Mexico, where the first-level administrative division is the state. They should not be confused with cities or towns that may share the same name as they are distinct entities and do not share geographical boundaries. As of March 2024, there are 2,476 municipalities in Mexico, excluding the 16 boroughs of Mexico City.