Spencer, Iowa Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Spencer, Iowa is 11,393 as of the 2023 American Community Survey, making it the 35th-largest city in Iowa. The median household income is $57,068, the median home value is $178,300, and the median age is 41.3.
The population has grown 1.7% since 2010 (11,225 → 11,418).
11,393
Population
1041
People / sq mi
$57,068
Median Income
$178,300
Median Home Value
Spencer covers 10.9 sq mi of land at 1041 people per square mile.
About Spencer, IA
Spencer is a city in Iowa with a population of 11,393. It ranks #35 among cities in Iowa by population. The median age is 41.3, older than the national median. The population is 47.6% male and 52.4% female.
The median household income in Spencer is $57,068, below the US median of $74,580. 8.0% of residents live below the federal poverty level. Home values sit at a median of $178,300, with monthly rent averaging $795. The homeownership rate of 67.7% is higher than the national rate of 64.8%.
Educational attainment in Spencer reflects 28.2% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 5.6% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 17.4 minutes each way.
Spencer city Population History (2010-2024)
The city of Spencer city had a population of 11,225 in 2010 and 11,418 in 2024, a 1.7% growth over 14 years. The peak was 11,464 in 2023. Average annual growth rate: 0.13%.
11,418
Population (2024)
11,225
Population (2010)
11,464
Peak (2023)
0.13%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 11,225 |
| 2011 | 11,203 |
| 2012 | 11,164 |
| 2013 | 11,130 |
| 2014 | 11,180 |
| 2015 | 11,199 |
| 2016 | 11,094 |
| 2017 | 11,032 |
| 2018 | 11,011 |
| 2019 | 10,952 |
| 2020 | 11,304 |
| 2021 | 11,401 |
| 2022 | 11,440 |
| 2023 | 11,464 |
| 2024 | 11,418 |
Race & Ethnicity
| White | 93.7% |
| Black or African American | 0.7% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.7% |
| Two or More Races | 0.0% |
Economy & Income
$57,068
Median Household Income
$36,456
Per Capita Income
8.0%
Poverty Rate
3.3%
Unemployment Rate
Housing
$178,300
Median Home Value
$795
Median Rent
67.7%
Owner-Occupied
Education
95.2%
High School+
28.2%
Bachelor's+
Commute
1.6%
Drive Alone
79.3%
Public Transit
5.6%
Work From Home
17.4 min
Avg Commute
Community Profile
25.4%
Foreign Born
97.5%
Non-English at Home
8.0%
Veterans
15.5%
With Disability
94.8%
Health Insurance
95.8%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 28.7% |
| Manufacturing | 10.8% |
| Education, Health Care & Social Services | 9.9% |
| Finance, Insurance & Real Estate | 9.8% |
| Construction | 5.6% |
| Retail Trade | 4.9% |
| Information | 4.5% |
| Public Administration | 2.6% |
| Agriculture & Mining | 2.6% |
| Arts, Entertainment & Food Services | 2.5% |
| Transportation & Warehousing | 0.4% |
Largest cities in Iowa
Largest counties in Iowa
Part of Iowa
Metro areas in Iowa
City rankings
Frequently Asked Questions
Spencer, Iowa has a population of 11,393 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 35th-largest city in Iowa.
The median household income in Spencer, Iowa is $57,068, with 8.0% of residents living below the federal poverty level.
The median home value in Spencer, Iowa is $178,300, with median monthly rent at $795 and a homeownership rate of 67.7%.
The median age in Spencer, Iowa is 41.3 years. The population is 47.6% male and 52.4% female.
The population has grown 1.7% since 2010 (11,225 → 11,418).
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Statewide data for Iowa
Population, race, income, age, and trends across Iowa
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.