Spencer Flag

Spencer

County:
Clay County
County Seat:
Yes
Area (mi²):
10.948
State:
Iowa

Spencer is a city located in Clay County, Iowa. Spencer has a 2026 population of 11,418. It is also the county seat of Clay County. Spencer is currently declining at a rate of -0.4% annually but its population has increased by 1.01% since the most recent census, which recorded a population of 11,304 in 2020.

11.4K
Total Population
1,043
Density (mi²)
-46 -0.4%
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)