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is a city in southwestern Riverside County, California, United States. It was incorporated on December 1, 1989.
Temecula is bordered by Murrieta on the northwest and the Pechanga Indian Reservation on the south, with unincorporated areas of Riverside County on all of its other borders. It is served by the Interstate 15 (Temecula Valley Freeway), Interstate 215 and California State Route 79 (Temecula Parkway).
With neighboring Murrieta, Temecula forms the southwestern anchor of the Inland Empire region. It is almost equidistant to San Diego, Los Angeles, and Orange County, California. Temecula is also home to military families from nearby Camp Pendleton, MCAS Miramar, March Air Reserve Base and the Navy bases in San Diego.