Spencer County, Indiana Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 73rd-largest in Indiana
The population of Spencer County, Indiana is 19,871 as of the 2023 American Community Survey, making it the 73rd-largest county in Indiana. The median household income is $70,890, the median home value is $180,200, and the median age is 44.2.
The population of Spencer County has declined 3.5% since 2010 (20,916 → 20,192), a -0.25% annualized rate.
19,871
Population
-0.25%
Annual growth
50
People / sq mi
$70,890
Median Income
$180,200
Median Home Value
Spencer County covers 397 sq mi of land at 50.1 people per square mile.
About Spencer County, IN
Spencer County is a county in Indiana with a population of 19,871. It ranks #73 among counties in Indiana by population. The median age is 44.2, older than the national median. The population is 51.1% male and 48.9% female.
The median household income in Spencer County is $70,890, near the US median of $74,580. 4.5% of residents live below the federal poverty level. Home values sit at a median of $180,200, with monthly rent averaging $697. The homeownership rate of 81.2% is higher than the national rate of 64.8%.
Educational attainment in Spencer County reflects 21.2% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 4.8% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 26.2 minutes each way.
Spencer County Population History (2010-2024)
The county of Spencer County had a population of 20,916 in 2010 and 20,192 in 2024, a -3.5% growth over 14 years. The peak was 20,971 in 2011. Average annual growth rate: -0.25%.
20,192
Population (2024)
20,916
Population (2010)
20,971
Peak (2011)
-0.25%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 20,916 |
| 2011 | 20,971 |
| 2012 | 20,784 |
| 2013 | 20,765 |
| 2014 | 20,764 |
| 2015 | 20,644 |
| 2016 | 20,496 |
| 2017 | 20,441 |
| 2018 | 20,385 |
| 2019 | 20,273 |
| 2020 | 19,833 |
| 2021 | 19,841 |
| 2022 | 19,890 |
| 2023 | 20,018 |
| 2024 | 20,192 |
Race & Ethnicity
| White | 94.8% |
| Black or African American | 0.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.7% |
| Two or More Races | 0.0% |
Age & Sex
44.2
Median Age
48.9%
Female
51.1%
Male
20.2%
Age 65+
Age Distribution
Children (under 15): 17.6% · Seniors (65+): 20.2%
Income & Poverty
| Median household income | $70,890+$839 vs state |
| Mean household income | $87,894 |
| Per-capita income | $36,718 |
| Poverty rate | 4.5%-3.9% vs state |
| Unemployment rate | 2.1% |
| Employment-to-population | 60.6% |
Top Industries by Employment
The largest employment sector in Spencer County is professional & business services, accounting for 23.1% of workers.
How residents commute
0.0%
Drive alone
1.8%
Carpool
86.6%
Public transit
4.8%
Work from home
26.2 min
Avg commute
Housing
$180,200$-21,400 vs state
Median home value
$697
Median rent
81.2%
Homeownership rate
8,685
Total housing units
91.9%
Occupied
8.1%
Vacant
18.8%
Renter-occupied
Social & access
96.2%
With health insurance
90.6%
With broadband internet
28.3%
Foreign-born
7.9%
Veterans (18+)
14.1%
With a disability
96.9%
Speak language other than English at home
Education
93.1%
High School+
21.2%
Bachelor's+
Largest cities in Indiana
Other counties in Indiana
Part of Indiana
Metro areas in Indiana
County rankings
Frequently Asked Questions
Spencer County, Indiana has a population of 19,871 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 73rd-largest county in Indiana. Population density is 50 people per square mile.
The population of Spencer County has declined 3.5% since 2010 (20,916 → 20,192), a -0.25% annualized rate.
The median household income in Spencer County, Indiana is $70,890, with mean (average) household income of $87,894 and per-capita income of $36,718. 4.5% of residents live below the federal poverty level.
In Spencer County, the largest racial and ethnic groups are White (94.8%), Hispanic or Latino (0.7%), Black or African American (0.6%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Spencer County, Indiana is 44.2 years. Residents are 48.9% female and 51.1% male.
The median home value in Spencer County is $180,200 and median monthly rent is $697. 81.2% of occupied housing units are owner-occupied. The county has 8,685 total housing units, 8.1% of which are vacant.
The largest employment sector in Spencer County, Indiana is professional, scientific, and management services, employing 23.1% of workers. The unemployment rate is 2.1%.
Indianapolis is among the largest cities associated with Spencer County, Indiana, with a population of 882,043.
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Statewide data for Indiana
Population, race, income, age, and trends across Indiana
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.