Letha is an unincorporated community and census-designated place in Gem County, Idaho The community is located 8 mi (13 km) west of Emmett.

[2] The Payette River flows northeast of Letha.

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.

Higher education, police, medical and legal services are found at nearby Emmett.

This Gem County, Idaho state location article is a stub.