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 a rapid bus route to and from downtown Los Angeles from the El Monte Busway, and a few of its local routes reach the far northern and western edge cities of neighboring Orange and San Bernardino counties, respectively. In 2025, the system had a ridership of 10,073,800, or about 32,200 per weekday as of the first quarter of 2026.