List of Latin American rail transit systems by ridership
The following is a list of all urban rail transit systems in Latin America, ranked by passenger ridership. These kinds of systems are most commonly known as "metro" (or "subway" in English), but may also be known as "subte", "tren", or "tranvía" systems. Daily and annual passengers ridership figures in this chart are based on annual and daily (not just weekday) average passenger trips. The year of the source date varies and is provided on the right. Overall, Brazil has the largest number of metros, with 12 such systems, followed by  Venezuela with 4 metro systems. The Mexico City Metro has the highest passenger ridership from a single operator in Latin America, and second in the Americas, after the New York City Subway. São Paulo is the city with the largest number of passengers carried by trains. <nowiki>*</nowiki>Corresponds to the ridership source provided for each transit system, except for the Santiago Metro, because that system's current line 3 inaugurated on January 22, 2019.