The United States has several major cities. Some of them have subways. Here are the biggest ones.
- New York City Subway
- Washington Metro
- Chicago L
- The T (Boston)
- Bay Area Rapid Transit (San Francisco Bay Area) and Muni Metro (San Francisco itself)
- Port Authority Trans Hudson (New York and New Jersey)
- Philadelphia Subways (SEPTA and PATCO)
- Los Angeles Metro Rail
- MARTA (Atlanta)
- Metro SubwayLink (Baltimore)
- RTA Rapid Transit (Cleveland; aka "The Rapid")
- Miami Metrorail
