| Official Name: | Barnes Lake, Michigan |
| Settlement Type: | Census-designated place (CDP) & unincorporated community |
| Pushpin Map: | Michigan#USA |
| Pushpin Label Position: | left |
| Pushpin Label: | Barnes Lake |
| Pushpin Map Caption: | Location within the state of Michigan##Location within the United States |
| Mapsize: | 250 |
| Coordinates: | 43.1792°N -83.3°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Michigan |
| Subdivision Type2: | County |
| Subdivision Name2: | Lapeer |
| Subdivision Type3: | Township |
| Subdivision Name3: | Deerfield |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 1.82 |
| Area Land Sq Mi: | 1.55 |
| Area Water Sq Mi: | 0.27 |
| Area Total Km2: | 4.72 |
| Area Land Km2: | 4.01 |
| Area Water Km2: | 0.71 |
| Population As Of: | 2020 |
| Population Density Km2: | 191.58 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 788 |
| Postal Code Type: | ZIP code(s) |
| Postal Code: | 48421 (Columbiaville) 48461 (North Branch) |
| Area Code: | 810 |
| Blank Name: | FIPS code |
| Blank Info: | 26-05466 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2804667 |
| Population Total: | 768 |
| Unit Pref: | Imperial |
| Population Density Sq Mi: | 495.48 |
Barnes Lake is a census-designated place (CDP) in the northwest part of Deerfield Township, Lapeer County, Michigan, United States, surrounding a lake of the same name. It is bordered to the west by the CDP of Millers Lake. M-24 forms the border between the two CDPs; the state highway leads north to Mayville and south 9miles to Lapeer.
Barnes Lake was first listed as a CDP prior to the 2020 census. Previously, the community was part of the Barnes Lake-Millers Lake CDP.