Yucaipa (Serrano: Yukaipa't) is a city located 10 miles (16 km) east of San Bernardino, in San Bernardino County, California, United States. The population was 54,542 at the 2020 census, up from 51,367 at the 2010 census. Yucaipa has the distinction of being the longtime home to a large population of Serrano Native Americans.