The Anza Trail, one of the first European overland routes to California, named after Juan Bautista de Anza, 4 crossed the valley in the 1770s. The tribe was named Luiseño by the Spanish due to their proximity to the Mission San Luís Rey de Francia ('The Mission of Saint Louis King of France,' known as the 'King of the Missions'), which was founded on June 13, 1798, by Father Fermín Francisco de Lasuén, in what was the First Military District in what now is Oceanside, California, in northern San Diego County.

They are a Native American people who at the time of the first contacts with the Spanish in the sixteenth century, inhabited the coastal area of southern California, ranging fifty miles from what now is the southern part of Los Angeles County, California to the northern part of contemporary San Diego County, California, and their settlements extended inland for thirty miles. In their own language, these people called themselves Payomkowishum (also spelled 'Payomkawichum'), meaning People of the West. The Luiseño were the original inhabitants of what later would be called the San Jacinto Valley, having many villages with residents. History San Jacinto grew out of Rancho San Jacinto Viejo, granted in 1842 to Californio politician Don José Antonio Estudillo, considered to be the founder of San Jacinto and a member of the prominent Estudillo family of California. They operate an Indian tribal school, the Noli Academy. The Sobobas are sovereign and self-sufficient in community affairs. San Jacinto also is home to the Soboba Casino, a gaming casino owned and operated by the Soboba Band of Luiseño Indians. In the late 19th century and early 20th century, the city became a home to many dairies, and a center for agriculture. San Jacinto will also be home to the eastern end of the Mid County Parkway, a planned route that would eventually connect it to the city of Perris. San Jacinto College, a community college founded in 1965.

The city was founded in 1870 and incorporated on April 20, 1888, making it one of the oldest cities in Riverside County. The population was 44,199 at the 2010 census. The mountains associated with the valley are the San Jacinto Mountains. It is located at the north end of the San Jacinto Valley, with Hemet to its south and Beaumont, California, to its north. Hyacinth') is a city in Riverside County, California, United States. San Jacinto ( / ˌ s æ n h ə ˈ s ɪ n t oʊ, j ə ˈ s ɪ n t oʊ/ SAN hə- SIN-toh, yə- SIN-toh Spanish: Spanish for ' St.

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