| Official Name: | Edgar, Montana |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Montana#USA |
| Pushpin Label: | Edgar |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Montana |
| Subdivision Type2: | County |
| Subdivision Name2: | Carbon |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 1.79 |
| Area Land Km2: | 1.76 |
| Area Water Km2: | 0.03 |
| Area Total Sq Mi: | 0.69 |
| Area Land Sq Mi: | 0.68 |
| Area Water Sq Mi: | 0.01 |
| Population As Of: | 2020 |
| Population Total: | 110 |
| Population Density Km2: | 62.49 |
| Population Density Sq Mi: | 161.76 |
| Timezone: | Mountain (MST) |
| Utc Offset: | -7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | -6 |
| Elevation Ft: | 3468 |
| Coordinates: | 45.4653°N -108.8536°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 59026 |
| Area Code: | 406 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 771137 |
Edgar is a census-designated place and unincorporated community in Carbon County, Montana, United States. As of the 2010 census it had a population of 114.[2] Edgar has a post office with a ZIP code 59026.[3] The post office was established May 28, 1909 with John J. Thornton as its first postmaster.[4] Thornton named the town after his brother.[5]
Edgar lies east of the intersection of U.S. Route 310 and Elwell Street. Edgar is south of Rockvale and northeast of Fromberg. Edgar is a small, agricultural community with a number of silos and elevators. It is also home to a bar & grill restaurant and some other services.