The Rockford Mass Transit District is the public transportation operator for the metro area of Rockford, 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 (Route 16 clockwise and 17 counterclockwise), which interconnects with every other service. In 2021, the system had a ridership of 840,200, or about 3,300 per weekday as of the second quarter of 2022.