The Metropolitan Transit Authority of Harris County, branded as METRO, is a major public transportation agency based in Houston, Texas, United States. It operates bus, light rail, bus rapid transit, HOV and HOT lanes, and paratransit service in the city as well as most of Harris County. It also operates bus service to Missouri City in Fort Bend County and previously operated to Conroe in Montgomery County. The Metro headquarters are in the Lee P. Brown Administration Building in Downtown Houston. In 2025, the system had a ridership of 77,996,900, or about 248,400 per weekday as of the first quarter of 2026.