Ciudad Constitución is a city in the Mexican state of Baja California Sur. Ciudad Constitución's population was 40,935 inhabitants at the 2010 census. It is the fifth-largest community in the state (behind La Paz, San José del Cabo, Cabo San Lucas, and Colonia del Sol). Ciudad Constitución is a small city which serves as a gateway to Magdalena Bay. It is also close to the Baja 1000 course.