List of North American light rail systems by ridership

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". All figures are from 2018 and the fourth quarter (Q4) of 2018, unless otherwise noted. "Daily boardings per mile" figures have been rounded to the nearest 5 or 10.
The question of which systems would count as "light rail transit systems" is debatable, so this table includes some systems (such as Toronto's) which are technically streetcars rather than "true" light rail.
Systems.
Sources:
Excluded systems.
The following systems have been excluded from the ridership table above (generally because the system's ridership statistics are not tracked by APTA): 