Michigan State Route 37 runs north-south through Northwestern Calhoun County. It runs from Interstate 94/BUSN Loop I-94, near Battle Creek, to the Calhoun/Barry County Line, near Bedford Charter Township. MI St Rt 37 passes through the following towns in Calhoun County. Battle Creek
Springfield MI St Rt 37 is multi-plexed in Calhoun County. BUSN Loop I-94, at Battle Creek.