St. Charles is a village in Saginaw County in the U.S. state of Michigan.

As of the census[7] of 2010, there were 2,054 people, 864 households, and 550 families living in the village.

30.6% of all households were made up of individuals, and 14.5% had someone living alone who was 65 years of age or older.

As of the census[4] of 2000, there were 2,215 people, 865 households, and 615 families living in the village.

25.1% of all households were made up of individuals, and 11.3% had someone living alone who was 65 years of age or older.

This climatic region is typified by large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters.