Weston County, Wyoming Cities (2026)

City
Rank
2026 Pop.
2020 Pop.
Annual Change
Density (/mi²)
Area (mi²)
Type
Newcastle13,3493,3610%1,3083 City
Upton28998950.22%3483 Town

Weston County Cities Summary

Largest City

Newcastle is the largest city in Weston County, with a population of 3,349.

Smallest City

Upton is the smallest city in Weston County, with a population of 899.

10 Largest Cities

There are 2 cities in Weston County, Wyoming.

Location of Weston County