Michigan State Route 37 runs north-south through Central Kent County. It goes from the Barry/Kent County Line, near Caledonia, to the Kent/Muskegon County Line, at Casnovia. MI St Rt 37 passes through the following towns in Kent County. Caledonia Kentwood
Grand Rapids Walker Sparta Casnovia MI St Rt 37 is multi-plexed in Kent County. Michigan State Route 44, from Kentwood to near Grand Rapids.