Michigan State Route 45 runs east-west in West-Central Michigan. It goes from U.S. Rt. 31, at Agnew, to Interstate 196, at Grand Rapids. This provides a direct link between the Grand Rapids Metro and the Lake Michigan shores. MI St Rt 45 passes through the following towns in Ottawa County. Agnew
Allendale MI St Rt 45 is not multi-plexed in Ottawa County. MI St Rt 45 interstects the following highway in Ottawa County. U.S. Rt. 31, at Agnew.