Barnes Lake-Millers Lake was a census-designated place (CDP) in Lapeer County in the U.S. state of Michigan.

The CDP was used for statistical purposes and had no legal status as a municipality.

Both lakes drain into the Flint River, which is about one mile (1.6 km) to the north.

18.9% of all households were made up of individuals, and 8.1% had someone living alone who was 65 years of age or older.

None of the families and 2.5% of the population were living below the poverty line, including no under eighteens and none of those over 64.