| Official Name: | Trimountain, Michigan |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Michigan#USA |
| Pushpin Label: | Trimountain |
| Coordinates: | 47.0553°N -88.6589°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Michigan |
| Subdivision Type2: | County |
| Subdivision Name2: | Houghton |
| Subdivision Type3: | Township |
| Subdivision Name3: | Adams |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 0.47 |
| Area Land Sq Mi: | 0.47 |
| Area Water Sq Mi: | 0.00 |
| Area Total Km2: | 1.21 |
| Area Land Km2: | 1.21 |
| Area Water Km2: | 0.00 |
| Population As Of: | 2020 |
| Population Density Km2: | 175.09 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 1305 |
| Postal Code Type: | ZIP Codes |
| Postal Code: | 49905 (Atlantic Mine) 49963 (South Range) |
| Area Code: | 906 |
| Blank Name: | FIPS code |
| Blank Info: | 26-80480 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2806337 |
| Population Total: | 212 |
| Unit Pref: | Imperial |
| Population Density Sq Mi: | 453.96 |
Trimountain is an unincorporated community and census-designated place (CDP) in the northern part of Adams Township, Houghton County, Michigan, United States. It is along highway M-26 between South Range to the northeast and Painesdale to the southwest. Houghton, the county seat, is 7miles to the northeast.
Trimountain was first listed as a CDP prior to the 2020 census.