Franklin County, Idaho Cities (2026)

City
Rank
2026 Pop. ↓
2020 Pop.
Annual Change
Density (/mi²)
Area (mi²)
Type
Preston16,3115,5512.17%9247 City
Franklin21,1821,0292.34%9081 City
Weston36015132.56%3162 City
Dayton45505210.92%827 City
Clifton54764152.15%2072 City
Oxford644392.33%1690 City

Franklin County Cities Summary

Largest City

Preston is the largest city in Franklin County, with a population of 6,311.

Smallest City

Oxford is the smallest city in Franklin County, with a population of 44.

10 Largest Cities

There are 6 cities in Franklin County, Idaho.

Location of Franklin County