Foothill Transit is a public transit agency that is government funded by 22 member cities in the San Gabriel and Pomona valleys. It operates a fixed-route bus public transit service in the San Gabriel Valley region of eastern Los Angeles County, California, United States, as well as the very far western tip cities of neighboring San Bernardino County. In 2021, the system had a ridership of 5,566,300, or about 26,900 per weekday as of the second quarter of 2022.