Muir is a village in Lyons Township, Ionia County in the U.S. state of Michigan.

[4] As of the census[7] of 2010, there were 604 people, 227 households, and 166 families living in the village.

22.5% of all households were made up of individuals, and 8% had someone living alone who was 65 years of age or older.

As of the census[3] of 2000, there were 634 people, 246 households, and 171 families living in the village.

There were 264 housing units at an average density of 345.8 per square mile (133.5/km2).

25.6% of all households were made up of individuals, and 10.6% had someone living alone who was 65 years of age or older.