Decatur County, Tennessee Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 87th-largest in Tennessee
The population of Decatur County, Tennessee is 11,499 as of the 2023 American Community Survey, making it the 87th-largest county in Tennessee. The median household income is $46,190, the median home value is $133,900, and the median age is 45.9.
The population of Decatur County has grown 0.7% since 2010 (11,713 → 11,800), a +0.05% annualized rate.
11,499
Population
+0.05%
Annual growth
34
People / sq mi
$46,190
Median Income
$133,900
Median Home Value
Decatur County covers 334 sq mi of land at 34.4 people per square mile.
About Decatur County, TN
Decatur County is a county in Tennessee with a population of 11,499. It ranks #87 among counties in Tennessee by population. The median age is 45.9, older than the national median. The population is 50.4% male and 49.6% female.
The median household income in Decatur County is $46,190, below the US median of $74,580. 16.7% of residents live below the federal poverty level. Home values sit at a median of $133,900, with monthly rent averaging $716. The homeownership rate of 75.0% is higher than the national rate of 64.8%.
Educational attainment in Decatur County reflects 15.0% 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 25.8 minutes each way.
Decatur County Population History (2010-2024)
The county of Decatur County had a population of 11,713 in 2010 and 11,800 in 2024, a 0.7% growth over 14 years. The peak was 11,800 in 2024. Average annual growth rate: 0.06%.
11,800
Population (2024)
11,713
Population (2010)
11,800
Peak (2024)
0.06%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 11,713 |
| 2011 | 11,679 |
| 2012 | 11,631 |
| 2013 | 11,693 |
| 2014 | 11,681 |
| 2015 | 11,596 |
| 2016 | 11,728 |
| 2017 | 11,711 |
| 2018 | 11,669 |
| 2019 | 11,608 |
| 2020 | 11,433 |
| 2021 | 11,408 |
| 2022 | 11,546 |
| 2023 | 11,709 |
| 2024 | 11,800 |
Race & Ethnicity
| White | 91.6% |
| Black or African American | 3.1% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.9% |
| Two or More Races | 0.0% |
Age & Sex
45.9
Median Age
49.6%
Female
50.4%
Male
23.7%
Age 65+
Age Distribution
Children (under 15): 16.1% · Seniors (65+): 23.7%
Income & Poverty
| Median household income | $46,190$-20,907 vs state |
| Mean household income | $62,272 |
| Per-capita income | $26,073 |
| Poverty rate | 16.7%+6.8% vs state |
| Unemployment rate | 4.0% |
| Employment-to-population | 44.6% |
Top Industries by Employment
The largest employment sector in Decatur County is manufacturing, accounting for 24.0% of workers.
How residents commute
0.2%
Drive alone
1.9%
Carpool
83.2%
Public transit
4.8%
Work from home
25.8 min
Avg commute
Housing
$133,900$-122,900 vs state
Median home value
$716
Median rent
75.0%
Homeownership rate
6,588
Total housing units
67.4%
Occupied
32.6%
Vacant
25.0%
Renter-occupied
Social & access
89.6%
With health insurance
85.8%
With broadband internet
23.6%
Foreign-born
6.0%
Veterans (18+)
17.6%
With a disability
97.8%
Speak language other than English at home
Education
84.2%
High School+
15.0%
Bachelor's+
Largest cities in Tennessee
Other counties in Tennessee
Part of Tennessee
Metro areas in Tennessee
County rankings
Frequently Asked Questions
Decatur County, Tennessee has a population of 11,499 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 87th-largest county in Tennessee. Population density is 34 people per square mile.
The population of Decatur County has grown 0.7% since 2010 (11,713 → 11,800), a +0.05% annualized rate.
The median household income in Decatur County, Tennessee is $46,190, with mean (average) household income of $62,272 and per-capita income of $26,073. 16.7% of residents live below the federal poverty level.
In Decatur County, the largest racial and ethnic groups are White (91.6%), Black or African American (3.1%), Hispanic or Latino (0.9%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Decatur County, Tennessee is 45.9 years. Residents are 49.6% female and 50.4% male.
The median home value in Decatur County is $133,900 and median monthly rent is $716. 75.0% of occupied housing units are owner-occupied. The county has 6,588 total housing units, 32.6% of which are vacant.
The largest employment sector in Decatur County, Tennessee is manufacturing, employing 24.0% of workers. The unemployment rate is 4.0%.
Nashville-Davidson is among the largest cities associated with Decatur County, Tennessee, with a population of 684,298.
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Full rankings of Tennessee counties
Statewide data for Tennessee
Population, race, income, age, and trends across Tennessee
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.