| Official Name: | Dean, Montana |
| Settlement Type: | unincorporated community |
| Pushpin Map: | Montana#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Montana |
| Subdivision Type2: | County |
| Subdivision Name2: | Stillwater |
| Area Footnotes: | [1] |
| Population As Of: | 2010 |
| Population Footnotes: | [2] |
| Population Total: | N\A |
| Population Density Sq Mi: | auto |
| Timezone: | Mountain (MST) |
| Utc Offset: | -7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | -6 |
| Elevation Ft: | 5244 |
| Coordinates: | 45.4044°N -109.6903°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 59061 |
| Area Code: | 406 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 777090 |
Dean is an unincorporated community located in Stillwater County, Montana, United States.
Dean is at an elevation of 5,244 feet and appears on the Beehive U.S. Geological Survey Map, while sharing a ZIP code with Nye of 59061.
Located on the north side of the Beartooth Mountains, Dean has its roots mainly in agriculture and a few nearby mines. Dean's post office was established on Mar 10, 1902 with Bessie Haskin as its first postmaster. The post office was closed on April 15, 1914,[3] and then reopened from 1915 to 1951.
Today, Dean survives as a small community with a number of permanent and seasonal homes.