Valley Metro Bus is a transit bus system for public transport in Maricopa County, Arizona, United States. In 2021, the system had a ridership of 5,708,700, or about 21,600 per weekday as of the second quarter of 2022. Buses are operated by private companies contracted by Valley Metro and the City of Phoenix. Service currently operates throughout the broader Phoenix Metropolitan Area. All buses have wheelchair ramps or lifts, and except for paratransit vehicles, all buses have bike racks.