Johnston Flag

Johnston

County:
Polk County
County Seat:
No
Area (mi²):
19.49
State:
Iowa

Johnston is a city located in Polk County, Iowa. Johnston has a 2026 population of 25,022. Johnston is currently growing at a rate of 1.72% annually and its population has increased by 4.29% since the most recent census, which recorded a population of 23,992 in 2020.

25K
Total Population
1,284
Density (mi²)
424 1.72%
Growth

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)