Boulevard is a census-designated place in the Mountain Empire area of southeastern San Diego County. At the 2010 census, it had a population of 315. The area is rural desert along the Mexican border near the eastern extent of San Diego County.The Boulevard area encompasses the communities of Manzanita, Live Oak Springs and Tierra Del Sol. Nearby communities in the same wire center for wired telephones include: Calexico Lodge, Jacumba, Live Oak Springs, Manzanita, Pueblo Siding, and Tierra del Sol. Default wired telephone numbers for this area follow the format 766-xxxx. The ZIP code is 91905.