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
The poverty rate is what most separates Spencer County from the typical county: 4.5% of residents live below the federal poverty line, against 12.4% nationally. Spencer County is a county in Indiana with a population of 19,871.
The typical household here earns about $70,890, below the US median of $78,538. Hardship is rare relative to US counties: a poverty rate of just 4.5%, below the national 12.4%. Homes carry a median value of $180,200, with typical rent around $697.
Roughly 21.2% of adults have a bachelor’s, below the national 35.0%. Most workers commute: only 4.8% work from home, below the national 14.0%, and the average commute runs about 26 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.