Public transit in Jackson County began with
horsecars in 1905, with the Murphysboro Street Railway Co. In 1908, the horsecars were replaced with
streetcars, which in turn were replaced by
buses in 1927. In 1992, the Jackson County Board founded what would become the Jackson County Mass Transit District for the sake of providing public transportation across the county. In 2002, JCMTD had finally began its first rides. In 2019, the agency began planning on a new operations and maintenance facility in Carbondale. As part of a Rebuild Illinois grant, the agency received funding for the new facility in 2023, along with funding to build an operations and administrative office in Murphysboro. In 2024, JCMTD took over operations of the Saluki Express service in Carbondale previously operated by the Rides Mass Transit District
. This also saw the creation of 4 new fixed-routes based on the old Saluki Express Routes. In October of the same year, the agency announced it would be changing its name from Jackson County Mass Transit District to JAX Mass Transit. In November, they introduced a new app to assist passengers with fixed route schedules and bus tracking as well as the Big Muddy Route which provides Carbondale access to
Murphysboro. ==Service==