Demographics of Johnson County, Tennessee

Johnson County, Tennessee had 18,718 people on July 1, 2025, by the Census Bureau’s estimate: +733 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.

Johnson County, in four figures

18,718
Population: July 1, 2025, Vintage 2025 estimate.; +4.1%
Change since July 2020: +733 people.; 46.7 ±0.7
Median age: ACS 2020–⁠2024.; $53,129 ±$4,322
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.

Johnson County, Tennessee's population grew 4.1% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Johnson 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

Johnson County, Tennessee's population grew 4.1% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Johnson 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	17,985	100.0	100.0
2021	18,042	100.3	100.2
2022	18,005	100.1	100.7
2023	18,325	101.9	101.6
2024	18,522	103.0	102.5
2025	18,718	104.1	103.1

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Population of Johnson 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	17,985	+41	−24	0	+72
2021	18,042	+57	−152	+6	+201
2022	18,005	−37	−182	+19	+130
2023	18,325	+320	−144	+10	+440
2024	18,522	+197	−124	+65	+254
2025	18,718	+196	−119	+14	+304

Age, 2020–2024

The median age is 46.7 ±0.7: for men 44.6 ±0.4 and for women 50.8 ±2.3. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Johnson County by age, ACS 2020–2024
Age	People	Share	Tennessee	United States
Under 5	745 ±36	4.1% ±0.2	5.8% ±<0.1	5.6% ±<0.1
5 to 17	2,288 ±198	12.6% ±1.1	16.4% ±0.1	16.3% ±<0.1
18 to 24	1,263 ±217	6.9% ±1.2	8.9% ±0.1	9.1% ±<0.1
25 to 44	4,330 ±282	23.8% ±1.6	26.7% ±0.1	26.9% ±<0.1
45 to 64	5,297 ±311	29.1% ±1.7	25.2% ±0.1	24.8% ±<0.1
65 and over	4,273 ±412	23.5% ±2.3	17.1% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $53,129 ±$4,322, and income per person $28,841 ±$2,288, 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 Johnson County by income, ACS 2020–2024
Household income	Households	Share	Tennessee	United States
Under $25,000	1,559 ±277	21.4% ±3.7	16.6% ±0.2	14.6% ±<0.1
$25,000 to $49,999	1,874 ±320	25.7% ±4.2	19.4% ±0.2	16.7% ±<0.1
$50,000 to $74,999	1,303 ±278	17.9% ±3.7	17.3% ±0.2	15.5% ±<0.1
$75,000 to $99,999	985 ±200	13.5% ±2.7	13.2% ±0.2	12.6% ±<0.1
$100,000 to $149,999	984 ±213	13.5% ±2.9	16.8% ±0.2	17.5% ±<0.1
$150,000 to $199,999	181 to 535	4.9% ±2.4	7.7% ±0.1	9.6% ±<0.1
$200,000 or more	235 ±85	3.2% ±1.2	9.0% ±0.1	13.4% ±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%.

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 Johnson County by age, ACS 2020–2024
Age	Below poverty	Rate	Tennessee	United States
All ages	3,521 ±737	21.4% ±4.5	13.8% ±0.2	12.5% ±0.1
Under 18	1,136 ±268	39.9% ±7.6	18.8% ±0.4	16.1% ±0.1
18 to 59	1,540 ±376	18.8% ±4.4	12.7% ±0.2	11.6% ±0.1
60 and over	845 ±223	15.8% ±4.0	11.4% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Johnson County, ACS 2020–2024
Measure	Johnson County	Tennessee	United States
Housing units	8,761 ±34	3,143,670 ±903	143,775,355 ±10,234
Occupied	83.3% ±3.7	89.8% ±0.2	89.9% ±0.1
Vacant	16.7% ±3.7	10.2% ±0.2	10.1% ±0.1
Owner occupied	77.5% ±3.3	66.9% ±0.3	65.2% ±0.3
Renter occupied	22.5% ±4.0	33.1% ±0.3	34.8% ±0.1
Median home value	$178,600 ±$19,569	$286,700 ±$1,492	$332,700 ±$236
Median gross rent	$674 ±$48	$1,189 ±$7	$1,413 ±$2
Median year built	1981 ±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 Johnson County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Tennessee	United States
Hispanic or Latino	591 ±0	3.2% ±<0.1	7.4% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	15,880 ±360	87.3% ±2.0	71.0% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	853 ±177	4.7% ±1.0	15.4% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	52 ±18	0.3% ±0.1	1.9% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	26 to 194	0.1% to 1.1%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 22	0% to 0.1%	0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 160	0% to 0.9%	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	636 ±267	3.5% ±1.5	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 Johnson County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Tennessee	United States
Born in the state	8,040 ±535	44.2% ±2.9	57.2% ±0.2	57.3% ±<0.1
Born in another state	9,631 ±525	52.9% ±2.9	35.7% ±0.2	26.9% ±<0.1
Born a citizen outside the states	22 to 160	0.1% to 0.9%	1.0% ±<0.1	1.7% ±<0.1
Born abroad	434 ±147	2.4% ±0.8	6.1% ±0.1	14.1% ±<0.1
Naturalized citizens	77 to 229	0.4% to 1.3%	2.4% ±0.1	7.4% ±<0.1
Not citizens	136 to 426	0.7% to 2.3%	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%.

Johnson County among the counties of Tennessee

70th of 95 by population, July 2025. Every one is listed on the Tennessee page.

Counties of Tennessee near Johnson County in population, July 2025
County	July 2025	Change since 2020
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%
Polk County	18,592	+5.9%
Chester County	17,994	+3.5%
Sequatchie County	17,861	+12.7%
Unicoi County	17,856	−0.1%
Haywood County	17,042	−4.4%

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