| Official Name: | Quietus |
| Settlement Type: | unincorporated community |
| Pushpin Map: | Montana#USA |
| Pushpin Map Caption: | Location in Montana |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Montana |
| Subdivision Type2: | County |
| Subdivision Name2: | Big Horn |
| 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: | 4702 |
| Coordinates: | 45.0964°N -106.2831°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 59027 |
| Area Code: | 406 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 775514 |
Quietus is the site of a former town, centered on a post office now closed, and a community in the surrounding area. It was located in Big Horn County, Montana, United States. No one lives at the site of the former town. The surrounding area is now an unincorporated community. It appears on the U.S. Geological Survey Map.
Quietus was established as a post office in 1907 to service homesteaders and ranchers living in the valleys of the Otter and Quietus Creeks. Though never a large community, the local population eventually dwindled to less than a dozen residents, until the post office closed in 1957. Today, Quietus is a "ghost town," the loop road and the post office building remains, though it has collapsed.[3]
According to local anecdote Frank Brittain sent a list of fifteen names with the town's application for a post office in 1914, and all of them were rejected. "Well, I guess they put a quietus on that," Brittain said to his wife. She saw the opportunity, and renewed the application, and a few weeks later the name Quietus was approved.[4]