The following is a list of all light rail systems in the United States. Also included are some of the urban streetcar/trolley systems that provide regular public transit service, ones with data available from the American Public Transportation Association's (APTA) Ridership Reports. This list does not include statistics for metro/rapid transit systems. Daily and annual ridership figures are based on "average weekday unlinked passenger trips". References with supplementary (non-APTA) ridership figures are included in the System column.