The History of
Indio, CA

Indio began as an Indian village and winter home for Native American people who regularly migrated from the surrounding mountains to the palm oasis along the San Andreas Fault zone in the Indio Hills. Their Indian villages were established along both sides of the Coachella Valley and the shores of ancient Lake Cahuilla, which was periodically filled by the Colorado River.  

Lake Cahuilla would remain for an unknown number of years before gradually drying up as the river changed course and flowed once again toward the Gulf of California. The present-day Salton Sea occupies part of that same depression. It formed in 1905, when Colorado River floodwaters broke through an irrigation levee in Imperial Valley and flowed unchecked into the Salton Sink until the breach was closed in 1907. 

In the late 1700s, a few exploratory and military expeditions passed through the Coachella Valley while traveling from Sonora, Mexico, to Los Angeles. Most travelers, however, chose routes through the mountains southwest of the valley.  

In general, the early American, Mexican, and Spanish presence had a limited effect on Native American Cahuilla society and did not threaten the locals’ hunter-gatherer way of life. However, the Cahuilla did develop economic and political strategies and organized into confederations of clans to deal with the early immigrants. Ultimately, Indian Reservations were created in the Coachella Valley, including the Agua Caliente, the Augustine, the Cabazon, and the Torres-Martinez. 

The discovery of gold in California in 1848 and the resulting Gold Rush brought many miners and settlers through the Coachella Valley. Many hoped the southern route to California would be less hazardous than crossing the Sierras. This movement drew the attention and interest of Congress. In 1853, Lieutenant Robert Williamson of the US Topographic Engineers explored the region in search of a practical route for a southern transcontinental railroad.  

In 1872, the site of the present-day city of Indio, CA, was selected as a Southern Pacific Railroad division point. The presence of an Indian labor force for railroad construction was considered an advantage. A roundhouse, sidings, crew housing, and a depot were built, and the first trains from Los Angeles arrived in 1876. By 1877, the railroad route reached Yuma, completing the last link in the southern transcontinental route. Indio first appeared on the train schedule as “Indian Wells,” but the name was changed to Indio to avoid confusion with other Indian Wells locations. 

Many of the first settlers in Indio were railroad employees and the shopkeepers who came to serve them. Soon, a formal town site for Indio was surveyed, and a map was filed with the San Diego County Recorder in 1888. Then, in 1893, Indio became one of the twelve townships of the newly designated Riverside County.  

By 1896, the community had 50 inhabitants. During this time, the town of Indio became more than a main stop on the Southern Pacific Railroad; it also served as a provisioning point for miners traveling into the mountains to the east, where gold mining was booming in the area now known as Joshua Tree National Park. The railroad’s need for water to operate steam engines led them to deeper and better wells. When a rich aquifer was discovered beneath the Coachella Valley, people came to drill wells and begin farming the valley floor. 

Indio’s long, warm growing season made the production of early vegetables and other crops profitable. This agricultural potential led the United States Department of Agriculture to establish a Date and Citrus Experiment Station in the town of Indio after closing the original station founded in 1904 in Mecca. The Indio USDA Station brought in scientists from around the world to study the information collected in the area. Their work contributed to the development of agriculture in the Coachella Valley. These same scientists brought date palm trees from Algeria to Indio in 1903. 

By 1909, the school census in the town of Indio showed that the school district encompassed 43 families and 82 children. This reflected the steady development of the community as more families settled in the area. In 1914, the Southern Sierras Power Company completed an electric power line to the Coachella Valley, bringing an important modern convenience to residents and businesses.  

Besides the convenience that electric power provided, it was also needed to pump water, since many of the early wells that had been flowing under artesian pressure had ceased to do so. As water demand increased and well levels dropped, electric power became essential for pumping water and supporting continued farming and settlement. 

As town development expanded, flooding from the surrounding canyons became a growing concern. In 1915, the Coachella Valley Stormwater District was formed and started building a four-mile levee to carry water around the town of Indio when a major flood struck in 1917, which flowed through Indio, other valley cities, and developed farmlands.  

On January 2, 1918, local residents formally voted to create the Coachella Valley County Water District to survey the valley’s water resources, carry out flood control measures, and search for alternative water sources. The latter led to a long campaign to secure rights to water from the Colorado River and, ultimately, to the construction of the Coachella Branch of the All-American Canal. Much of today’s development in the area would not have been possible without these forward-looking decisions. 

In 1930, Indio became the Coachella Valley’s first incorporated city. At the time, it had a population of 1,875. Its residents played an important role in securing paved highways through the valley. A section of Highway 99 was completed in 1923, followed by Highway 60-70 in 1936. That route eventually became Interstate 10 through the valley. Improved roads, along with the boom of the travel industry, brought new businesses and services to the city of Indio. 

One of the world’s largest construction projects in the 1930s was the building of the Metropolitan Aqueduct to carry water from the Colorado River to the Los Angeles Basin. The city of Indio played a key role as a supply depot in that effort. It served as the center for the distribution of supplies sent to mining crews constructing 92 miles of tunnel in the eastern mountains. The city also served as a center for recreation for the thousands of miners involved in the work.

World War II brought new challenges to the city of Indio. Camp Young, the training center for General George Patton’s troops, was located about 25 miles east of the city. Indio’s rail facilities made the city a valuable center for troop material deployment. The city also became a destination for troops seeking relaxation.

After World War II, the completion of the Coachella Branch of the All-American Canal supported the expansion and growth of the valley’s agricultural industry. The city of Indio also became a center for retail services and stores, as well as processing and packing facilities for valley produce. Additionally, the local population rose from 5,300 in 1950 to 13,450 in 1964.