Gem County, Idaho Cities (2025)

2 cities

City
Rank
2025 Pop. ↓
2020 Pop.
Change
Density
Area (mi²)
Type
Emmett19,0067,7212.94%3,3972.65 City
Letha27155657.2%1,5820.45 CDP

Gem County Cities Summary

Largest City

Emmett is the largest city in Gem County, with a population of 9,006.

Smallest City

Letha is the smallest city in Gem County.

10 Largest Cities

There are 2 cities in Gem County, Idaho.