Los Angeles Metro

The Los Angeles County Metropolitan Transportation Authority (LACMTA), branded as Metro, is the agency that plans, operates, and coordinates funding for most of the transportation system in Los Angeles County, California, the most populated county in the United States.

Metro directly operates a large public transit system that includes bus, bus rapid transit, light rail, and rapid transit services. The agency also provides funding for transit it does not operate, including Metrolink commuter rail, municipal bus operators and paratransit services. The agency also provides funding and directs planning for the Los Angeles freeway system and railroad projects within the county.

In 2025, the Metro system had a total ridership of 305,706,300, and had a ridership of 970,600 per weekday as of the second quarter of 2026. It is the largest transit agency by ridership in the state of California, and the second-largest in the United States after the New York City Transit Authority.