Temecula (; Spanish: Temécula, [te'mekula]; Luiseño: Temeekunga) is a city in southwestern Riverside County, California, United States. The city is a tourist and resort destination, with the Temecula Valley Wine Country, Old Town Temecula, the Temecula Valley Balloon & Wine Festival, the Temecula Valley International Film Festival, championship golf courses, and resort accommodations for tourists which contribute to the city's economic profile. Although Temecula is geographically closer to downtown San Diego than downtown Los Angeles, it is considered part of the Greater Los Angeles area.
The city of Temecula, forming the southwestern anchor of the Inland Empire region, is approximately 58 miles (93 km) north of downtown San Diego and 85 miles (137 km) southeast of downtown Los Angeles. Temecula is bordered by the city of Murrieta to the north and the Pechanga Indian Reservation and San Diego County to the south. With a population of 110,003 during the 2020 census, Temecula is the 5th most populous city in Riverside County. It was incorporated on December 1, 1989.