| Official Name: | Armathwaite, Tennessee |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Tennessee#USA |
| Pushpin Label: | Armathwaite |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Tennessee |
| Subdivision Type2: | County |
| Subdivision Name2: | Fentress |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 1470 |
| Coordinates: | 36.3742°N -84.7819°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 38504 |
| Area Code: | 931 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1314597 |
Armathwaite is an unincorporated community in Fentress County, Tennessee, United States. It is located along Tennessee State Route 52 between Allardt and Rugby, in Tennessee's Cumberland Plateau region. The Big South Fork National River and Recreation Area is located to the northeast.
The community was first settled in the 1840s. Around 1881, Alwyn Maude, a Rugby colonist, established a post office in the community, and named it for his home village of Armathwaite in England.[1] Oil drilling and logging activities took place in the area during the late 19th and early 20th centuries.[2]