Au Gres (/ˈɔːɡreɪ/ AW-gray) is a city in Arenac County in the U.S. state of Michigan.

French explorers named the location Point Au Grès; grès means "gritty stone" or "sandstone," from which the river and the town take their names.

It was first settled in 1862 temporarily by workers on the Saginaw–Au Sable State Road.

On August 8, 1867, the location, which was still a part of Bay County, was granted a post office with Bradley as the first postmaster.

[6] As of the census[8] of 2010, there were 889 people, 435 households, and 233 families living in the city.

41.1% of all households were made up of individuals, and 17.7% had someone living alone who was 65 years of age or older.

35.0% of all households were made up of individuals, and 15.6% had someone living alone who was 65 years of age or older.