Union Flag

Union

County:
Hardin County
County Seat:
No
Area (mi²):
0.571
State:
Iowa

Union is a city located in Hardin County, Iowa. Union has a 2026 population of 378. Union is currently declining at a rate of -0.79% annually and its population has decreased by -3.32% since the most recent census, which recorded a population of 391 in 2020.

378
Total Population
662
Density (mi²)
-3 -0.79%
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)