There are 6 cities in Jefferson County, Idaho.

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Rigby1Idaho5,8365,0713.4%2,4772.36
Menan2Idaho7427150.81%7191.03
Ririe3Idaho7126650.85%1,3770.52
Roberts4Idaho6204974.91%1,9750.31
Lewisville5Idaho4404161.15%7280.60
Mud Lake6Idaho3673193.38%2,5850.14
showing: 6 rows

Cities in Jefferson County, Idaho by Population (2024)

What is the largest city in Jefferson County, Idaho?

Rigby is the largest city in Jefferson County.

What is the smallest city in Jefferson County, Idaho?

Mud Lake is the smallest city in Jefferson County.

How many cities are in Jefferson County?

There are 6 cities in Jefferson County, Idaho.

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