The following is a list of all light rail systems in North America, ranked by ridership.
Daily figures for American and Canadian light rail systems are "average weekday unlinked passenger trips" (where transfers between lines are counted as two separate passenger "boardings" or "trips"), unless otherwise indicated.
For light rail systems in the United States and Canada, these figures come from the American Public Transit Association (APTA) Ridership Reports statistics.
For Mexico, the figures are obtained from Banco de Información Económica's Instituto Nacional de Estadísitica y Geografía (INEGI), and the daily figures represent daily passenger trips averaged from the monthly and quarterly ridership figures.
"Daily boardings per mile" figures have been rounded to the nearest 5 or 10.