Osceola County, Iowa Cities (2025)

5 cities

City
Rank
2025 Pop. ↓
2020 Pop.
Change
Density
Area (mi²)
Type
Sibley12,6972,857-1.17%1,5101.79 City
Ashton2418452-1.65%3741.12 City
Ocheyedan3409438-1.45%3611.13 City
Melvin4192202-1.03%1,1850.16 City
Harris5139151-1.42%1391 City

Osceola County Cities Summary

Largest City

Sibley is the largest city in Osceola County, with a population of 2,697.

Smallest City

Harris is the smallest city in Osceola County.

10 Largest Cities

There are 5 cities in Osceola County, Iowa.