The Rockford Mass Transit District is the public transportation operator for the Rockford metropolitan area, Illinois. Service is provided six days per week along 19 routes, with several of these routes being combined into five Sunday routes that service a large portion of the system. The core of the system is contained in The City Loop, which interconnects with every other service. In 2025, the system had a ridership of 1,525,400, or about 5,100 per weekday as of the fourth quarter of 2025.