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 2025 population of 11,549. It is also the county seat of Clay County. Spencer is currently growing at a rate of 0.43% annually and its population has increased by 2.18% since the most recent census, which recorded a population of 11,303 in 2020.

The average household income in Spencer is $78,039 with a poverty rate of 14.11%.The median age in Spencer is 41.3 years: 39.4 years for males, and 43 years for females.

11.5K
Total Population
1,055
Density (mi²)
49 0.43%
Growth

Spencer Population

Spencer Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Spencer includes 93.72% White, and smaller percentages for Black or African American, Native American, Asian, other race and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White10,67893.72%
Two or more races4894.29%
Black or African American780.68%
Native American630.55%
Asian470.41%
Other race380.33%

Spencer Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Spencer's average per capita income is $45,585. Household income levels show a median of $57,068. The poverty rate stands at 14.11%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$100,833-
Families$86,703$103,687
Households$57,068$78,039
Non Families$36,745$48,423

$45,585

Average Income

$57,068

Median Household Income

14.11%

Poverty Rate

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)