Michigan State Route 40 runs north-south through Central Allegan County. It goes from Holland to the Allegan/Van Buren County Line, via Allegan. MI St Rt 40 passes through the following towns in Allegan County. Holland
Fillmore Hamilton Dunningville Allegan
MI St Rt 40 is multi-plexed in Allegan County. Michigan State Route 89, from near Dunningville to Allegan. MI St Rt 40 intersects the following highways in Allegan County. BUSN Loop I-196, at Holland. U.S. Rt. 31, at Holland.
