Michigan State Route 91 is a north-south highway in Northwestern Ionia County. It runs from the junction with Michigan State Route 44 to the Ionia/Montcalm County Line, all ner Belding. MI St Rt 91 does not pass through any towns in Ionia County. MI St Rt 91 is not multi-pleed in Ionia County. MI St Rt 91 intersects the following highways in Ionia County. Michigan State Route 44, near Belding.
The southern end of MI St Rt 91. The southern end marker. A junction marker on EB MI St Rt 44. NB MI St Rt 91 north of MI St Rt 44. NB MI St Rt 91 near Ellis Road. SB MI St Rt 91 at the Ionia/Montcalm County Line.
