Mass transit in the United States#Cities edit

Name Area Type
  Metropolitan Atlanta Rapid Transit Authority Atlanta Metropolitan Area Bus routes, bus rapid transit, rail track, rapid transit, and streetcar
  Maryland Transit Administration Maryland Bus, light rail, heavy rail, commuter rail
  Massachusetts Bay Transportation Authority Greater Boston Bus, bus rapid transit, light rail, commuter rail, trolleybus, and ferryboat
  Niagara Frontier Transportation Authority Erie and Niagara counties, New York Bus, light rail, and rapid transit
  New Jersey Transit New Jersey, Manhattan, Rockland and Orange counties, New York, and Philadelphia County, Pennsylvania Commuter rail, light rail, and bus
  Lynx Rapid Transit Services Charlotte-Mecklenburg, North Carolina Light rail and streetcar (bus rapid transit planned)
  Chicago Transit Authority Chicago Metropolitan Area Bus and rapid transit, including the Chicago 'L'
  Metra Chicago Metropolitan Area Commuter rail
  RTA Rapid Transit Cuyahoga County, Ohio Rapid transit, light rail, and bus
  Dallas Area Rapid Transit Dallas, Texas Bus, light rail, commuter rail, streetcar
  Regional Transportation District Denver Metro Area, Colorado Bus and light rail
  METRORail Houston, Texas Light rail
  Los Angeles County Metro Rail Los Angeles County, California Rapid transit and light rail
  Miami-Dade Transit Greater Miami Rapid transit, people mover, bus rapid transit, and transit bus
  METRO Minneapolis-Saint Paul metropolitan area Light rail and bus rapid transit
  New Orleans Regional Transit Authority City of New Orleans and Orleans Parish, Louisiana Bus, heritage streetcar
  Metropolitan Transportation Authority (New York) New York City, Long Island, Lower Hudson Valley, and Coastal Connecticut Commuter rail, local and express bus, subway (including the New York City Subway), and bus rapid transit
  PATH Newark / Hudson County, New Jersey and Manhattan, New York Rapid transit
  Metro Light Rail (Phoenix) Phoenix-Tempe-Mesa, Arizona Light rail
  Southeastern Pennsylvania Transportation Authority Delaware Valley Commuter rail, interurban, rapid transit, streetcar, transit bus, and trolleybus
  Port Authority of Allegheny County Allegheny County and bordering portions of Beaver, Washington, Westmoreland and Armstrong counties Public transit, light rail, bus rapid transit, and inclined-plane railway (funicular)
  MAX Light Rail Portland metropolitan area, Oregon Light rail
  Sacramento Regional Transit District Sacramento, California Bus and light rail
  MetroLink Greater St. Louis Light rail
  Utah Transit Authority Wasatch Front, Utah Bus, light rail (including TRAX), commuter rail, and streetcar
  San Diego Metropolitan Transit System San Diego County, California Buses, bus rapid transit, light rail, commuter rail, paratransit, and streetcar
  Bay Area Rapid Transit San Francisco Bay Area Light rail
  San Francisco Municipal Railway San Francisco Bus, trolleybus, light rail, streetcar, and cable cars
  Santa Clara Valley Transportation Authority San Jose, California Bus and light rail
  Sound Transit Puget Sound region, Washington Regional express bus, commuter rail, and light rail
  Washington Metropolitan Area Transit Authority The District of Columbia and parts of Maryland and northern Virginia Rapid transit (Washington Metro), bus (Metrobus), and paratransit (MetroAccess)