The town and post office were named Boulevard after US Highway 80 which ran through town. Eventually Interstate 8 was constructed, bypassing the town. Local residents report an alternate version of the origin of the name. Boulevard used to be a stage coach stop, reportedly near today's McCain Valley road, east of today's core of Boulevard. Coming from Arizona, this stop was on the first long, flat straight stretch of road, "a boulevard", after climbing the winding In-Ko-Pah mountains and passing through windier roads in Jacumba.