Demographics of DeKalb County, Tennessee

DeKalb County, Tennessee had 21,873 people on July 1, 2025, by the Census Bureau’s estimate: +1,687 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

DeKalb County, in four figures

21,873
Population: July 1, 2025, Vintage 2025 estimate.; +8.4%
Change since July 2020: +1,687 people.; 41.9 ±1.1
Median age: ACS 2020–⁠2024.; $53,153 ±$7,562
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

DeKalb County, Tennessee's population grew 8.4% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of DeKalb County, Tennessee's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

DeKalb County, Tennessee's population grew 8.4% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of DeKalb County, Tennessee's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	20,186	100.0	100.0
2021	20,503	101.6	100.2
2022	20,987	104.0	100.7
2023	21,301	105.5	101.6
2024	21,684	107.4	102.5
2025	21,873	108.4	103.1

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Population of DeKalb County, Tennessee on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	20,186	+112	−4	0	+127
2021	20,503	+317	−60	+13	+371
2022	20,987	+484	−98	+21	+528
2023	21,301	+314	−15	+42	+282
2024	21,684	+383	−37	+64	+352
2025	21,873	+189	−38	+17	+210

Age, 2020–2024

The median age is 41.9 ±1.1: for men 39.4 ±2.0 and for women 44.1 ±2.0. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in DeKalb County by age, ACS 2020–2024
Age	People	Share	Tennessee	United States
Under 5	1,535 ±217	7.3% ±1.0	5.8% ±<0.1	5.6% ±<0.1
5 to 17	3,022 ±285	14.4% ±1.4	16.4% ±0.1	16.3% ±<0.1
18 to 24	1,576 ±310	7.5% ±1.5	8.9% ±0.1	9.1% ±<0.1
25 to 44	5,160 ±381	24.6% ±1.8	26.7% ±0.1	26.9% ±<0.1
45 to 64	5,733 ±350	27.4% ±1.7	25.2% ±0.1	24.8% ±<0.1
65 and over	3,933 ±337	18.8% ±1.6	17.1% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $53,153 ±$7,562, and income per person $30,133 ±$1,911, in 2024 dollars. The median is $69,595 ±$429 in Tennessee and $80,734 ±$166 in the United States.

Households by income

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Households in DeKalb County by income, ACS 2020–2024
Household income	Households	Share	Tennessee	United States
Under $25,000	2,031 ±365	23.5% ±4.2	16.6% ±0.2	14.6% ±<0.1
$25,000 to $49,999	2,043 ±389	23.6% ±4.4	19.4% ±0.2	16.7% ±<0.1
$50,000 to $74,999	1,426 ±282	16.5% ±3.2	17.3% ±0.2	15.5% ±<0.1
$75,000 to $99,999	1,132 ±237	13.1% ±2.7	13.2% ±0.2	12.6% ±<0.1
$100,000 to $149,999	1,273 ±340	14.7% ±3.9	16.8% ±0.2	17.5% ±<0.1
$150,000 to $199,999	467 ±161	5.4% ±1.9	7.7% ±0.1	9.6% ±<0.1
$200,000 or more	280 ±101	3.2% ±1.2	9.0% ±0.1	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in DeKalb County by age, ACS 2020–2024
Age	Below poverty	Rate	Tennessee	United States
All ages	3,835 ±806	18.6% ±3.9	13.8% ±0.2	12.5% ±0.1
Under 18	1,216 ±282	27.1% ±5.6	18.8% ±0.4	16.1% ±0.1
18 to 59	1,858 ±464	17.5% ±4.2	12.7% ±0.2	11.6% ±0.1
60 and over	761 ±248	13.6% ±4.3	11.4% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in DeKalb County, ACS 2020–2024
Measure	DeKalb County	Tennessee	United States
Housing units	10,155 ±30	3,143,670 ±903	143,775,355 ±10,234
Occupied	85.2% ±2.4	89.8% ±0.2	89.9% ±0.1
Vacant	14.8% ±2.4	10.2% ±0.2	10.1% ±0.1
Owner occupied	72.6% ±3.9	66.9% ±0.3	65.2% ±0.3
Renter occupied	27.4% ±4.2	33.1% ±0.3	34.8% ±0.1
Median home value	$235,500 ±$16,790	$286,700 ±$1,492	$332,700 ±$236
Median gross rent	$839 ±$151	$1,189 ±$7	$1,413 ±$2
Median year built	1986 ±3	1987 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in DeKalb County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Tennessee	United States
Hispanic or Latino	1,624 ±0	7.7% ±<0.1	7.4% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	18,243 ±78	87.0% ±0.4	71.0% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	304 ±73	1.5% ±0.3	15.4% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	227 ±52	1.1% ±0.2	1.9% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	14 to 82	0.1% to 0.4%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 26	0% to 0.1%	0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	2 to 74	< 0.1% to 0.4%	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	475 ±117	2.3% ±0.6	3.7% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in DeKalb County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Tennessee	United States
Born in the state	13,544 ±729	64.6% ±3.5	57.2% ±0.2	57.3% ±<0.1
Born in another state	6,306 ±746	30.1% ±3.6	35.7% ±0.2	26.9% ±<0.1
Born a citizen outside the states	32 to 156	0.2% to 0.7%	1.0% ±<0.1	1.7% ±<0.1
Born abroad	1,015 ±216	4.8% ±1.0	6.1% ±0.1	14.1% ±<0.1
Naturalized citizens	80 to 368	0.4% to 1.8%	2.4% ±0.1	7.4% ±<0.1
Not citizens	791 ±245	3.8% ±1.2	3.7% ±0.1	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

DeKalb County among the counties of Tennessee

65th of 95 by population, July 2025. Every one is listed on the Tennessee page.

Counties of Tennessee near DeKalb County in population, July 2025
County	July 2025	Change since 2020
Hardeman County	25,274	−0.6%
Lauderdale County	24,617	−2.0%
Overton County	23,787	+5.3%
Scott County	22,671	+3.6%
Morgan County	22,160	+5.3%
DeKalb County	21,873	+8.4%
Union County	21,450	+8.1%
Smith County	20,981	+5.1%
Fentress County	20,322	+9.7%
Humphreys County	19,646	+3.4%
Johnson County	18,718	+4.1%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026