Osceola County, Iowa Cities (2025)

5 cities

City
Rank
2025 Pop. ↓
2020 Pop.
Annual Change
Density
Area (mi²)
Type
Sibley12,7682,863-0.68%1,5502 City
Ashton2430450-0.92%3841 City
Ocheyedan3420439-0.94%3711 City
Melvin4194201-1.02%1,1980 City
Harris5143150-1.38%1431 City

Osceola County Cities Summary

Largest City

Sibley is the largest city in Osceola County, with a population of 2,768.

Smallest City

Harris is the smallest city in Osceola County, with a population of 143.

10 Largest Cities

There are 5 cities in Osceola County, Iowa.

Location of Osceola County