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.

Decatur County within Tennessee · Source: US Census TIGER/Line via us-atlas

11,499

Population

+0.05%

Annual growth

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

Among US counties, Decatur County stands out first on household income: a median of $46,190, below the US median of $78,538. Decatur County is a county in Tennessee with a population of 11,499.

Incomes run on the lower side: a median household income of $46,190, below the US median of $78,538. Roughly 16.7% of residents fall below the poverty line, above the national 12.4%. Housing is relatively affordable, with a median home value of $133,900, with typical rent around $716.

Degree attainment is on the lower side for US counties: 15.0% of adults hold a bachelor’s degree, below the national 35.0%. Just 4.8% of workers are home-based, below the national 14.0%, and the average commute runs about 26 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%.

Decatur County population, 2010–2024 · Source: U.S. Census Bureau — decennial census & Population Estimates

11,800

Population (2024)

11,713

Population (2010)

11,800

Peak (2024)

0.06%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	11,713	-	-	estimate
2011	11,679	-34	-0.29%	estimate
2012	11,631	-48	-0.41%	estimate
2013	11,693	+62	+0.53%	estimate
2014	11,681	-12	-0.10%	estimate
2015	11,596	-85	-0.73%	estimate
2016	11,728	+132	+1.14%	estimate
2017	11,711	-17	-0.14%	estimate
2018	11,669	-42	-0.36%	estimate
2019	11,608	-61	-0.52%	estimate
2020	11,433	-175	-1.51%	estimate
2021	11,408	-25	-0.22%	estimate
2022	11,546	+138	+1.21%	estimate
2023	11,709	+163	+1.41%	estimate
2024	11,800	+91	+0.78%	estimate

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

Under 5

4.9%

5–9

4.5%

10–14

6.7%

15–19

6.3%

20–24

4.9%

25–34

10.0%

35–44

11.4%

45–54

12.8%

55–59

8.0%

60–64

6.7%

65–74

14.3%

75–84

8.3%

85+

1.1%

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

Manufacturing

24.0%

Professional & business services

21.1%

Construction

7.5%

Public administration

7.0%

Retail trade

5.3%

Education & health care

5.0%

Arts, entertainment & food

5.0%

Finance & real estate

3.8%

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

Nashville-Davidson (684,298)Memphis (629,063)Knoxville (193,721)Chattanooga (182,832)Clarksville (171,897)Murfreesboro (157,547)Franklin (85,575)Johnson City (71,455)Jackson (68,098)Hendersonville (62,390)All Tennessee cities →

Other counties in Tennessee

Shelby County (922,195)Davidson County (709,846)Knox County (487,401)Hamilton County (370,913)Rutherford County (351,591)Williamson County (254,609)Montgomery County (227,957)Sumner County (200,553)Sullivan County (159,693)Wilson County (153,587)All Tennessee counties →

Part of Tennessee

Tennessee demographic profile All Tennessee data →

Metro areas in Tennessee

Nashville (2,043,713)Memphis (1,341,606)Knoxville (919,553)Chattanooga (569,333)Clarksville (328,626)Kingsport (309,580)Johnson City (208,934)Jackson (180,844)All US metros →

County rankings

US Counties by Population Richest US Counties by Median Household Income Expensive US Counties by Home Value Educated US Counties Counties With Highest Poverty Rates Youngest US Counties by Median Age Oldest US Counties by Median Age Cheapest US Counties by Median Home Value Racially Diverse US Counties Counties With Largest Hispanic Population All 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.