Temecula is a city in southwestern Riverside County, California, with a population of 100,097 during the 2010 census and an estimated 2013 population of 106,780. It was incorporated on December 1, 1989. Temecula is bordered by the City of Murrieta to the north and the Pechanga Indian Reservation and San Diego County to the south. The City of Temecula forms the southwestern anchor of the Inland Empire region.