Mars is a station on Metra's Milwaukee District West Line in Chicago, Illinois.

As of 2018, Mars is the 175th busiest of Metra's 236 non-downtown stations, with an average of 144 weekday boardings.

[1] As of February 15, 2024, Mars is served as a flag stop by 15 trains (nine inbound, six outbound) on weekdays only.

Metra's North Central Service trains use the tracks but do not stop.

A Shriners children's hospital sits to the north of the station.