| Letha, Idaho | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Idaho#USA |
| Pushpin Map Caption: | Location within the state of Idaho |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Idaho |
| Subdivision Type2: | County |
| Subdivision Name2: | Gem |
| Unit Pref: | Imperial |
| Population As Of: | 2010 |
| Population Density Km2: | auto |
| Timezone: | Mountain (MST) |
| Utc Offset: | -7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | -6 |
| Elevation Ft: | 2283 |
| Coordinates: | 43.8944°N -116.6478°W |
| Postal Code Type: | ZIP codes |
| Postal Code: | 83617 |
| Area Code: | 208, 986 |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 376166[1] |
Letha is an unincorporated community in Gem County, Idaho The community is located 8miles west of Emmett.[2] The Payette River flows northeast of Letha.
Letha was founded by W.W. Wilton and a Colonel Barnard and named for Wilton's daughter, Letha Wilton. It was built approximately midway along the railway running from Emmett to New Plymouth, Idaho, with anticipation that it would become a major rail center; although this never occurred, Letha today remains a service center for the adjacent farms and ranches.
Letha's population was estimated at 100 in 1960.[3]
The community includes a fire department, religious facilities, and manufacturing facilities. Higher education, police, medical and legal services are found at nearby Emmett.[4]