Demographics of Sullivan County, Tennessee

Sullivan County, Tennessee had 163,759 people on July 1, 2025, by the Census Bureau’s estimate: +5,521 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.

Sullivan County, in four figures

163,759
Population: July 1, 2025, Vintage 2025 estimate.; +3.5%
Change since July 2020: +5,521 people.; 45.0 ±0.2
Median age: ACS 2020–⁠2024.; $58,807 ±$2,321
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.

Sullivan County, Tennessee's population grew 3.5% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Sullivan 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

Sullivan County, Tennessee's population grew 3.5% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Sullivan 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	158,238	100.0	100.0
2021	159,250	100.6	100.2
2022	160,899	101.7	100.7
2023	161,953	102.3	101.6
2024	162,709	102.8	102.5
2025	163,759	103.5	103.1

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Population of Sullivan 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	158,238	+92	−215	0	+297
2021	159,250	+1,012	−1,178	+5	+2,203
2022	160,899	+1,649	−1,253	+41	+2,757
2023	161,953	+1,054	−1,039	+55	+2,021
2024	162,709	+756	−867	+187	+1,435
2025	163,759	+1,050	−873	+33	+1,906

Age, 2020–2024

The median age is 45.0 ±0.2: for men 43.6 ±0.3 and for women 46.3 ±0.3. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Sullivan County by age, ACS 2020–2024
Age	People	Share	Tennessee	United States
Under 5	7,611 ±169	4.7% ±0.1	5.8% ±<0.1	5.6% ±<0.1
5 to 17	22,999 ±793	14.3% ±0.5	16.4% ±0.1	16.3% ±<0.1
18 to 24	11,934 ±701	7.4% ±0.4	8.9% ±0.1	9.1% ±<0.1
25 to 44	37,785 ±870	23.5% ±0.5	26.7% ±0.1	26.9% ±<0.1
45 to 64	44,574 ±1,039	27.8% ±0.6	25.2% ±0.1	24.8% ±<0.1
65 and over	35,721 ±1,172	22.2% ±0.7	17.1% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $58,807 ±$2,321, and income per person $35,877 ±$981, 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 Sullivan County by income, ACS 2020–2024
Household income	Households	Share	Tennessee	United States
Under $25,000	13,652 ±1,074	19.8% ±1.5	16.6% ±0.2	14.6% ±<0.1
$25,000 to $49,999	15,959 ±1,050	23.2% ±1.5	19.4% ±0.2	16.7% ±<0.1
$50,000 to $74,999	11,642 ±888	16.9% ±1.3	17.3% ±0.2	15.5% ±<0.1
$75,000 to $99,999	8,813 ±820	12.8% ±1.2	13.2% ±0.2	12.6% ±<0.1
$100,000 to $149,999	9,899 ±796	14.4% ±1.1	16.8% ±0.2	17.5% ±<0.1
$150,000 to $199,999	4,534 ±539	6.6% ±0.8	7.7% ±0.1	9.6% ±<0.1
$200,000 or more	4,408 ±482	6.4% ±0.7	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 Sullivan County by age, ACS 2020–2024
Age	Below poverty	Rate	Tennessee	United States
All ages	24,426 ±1,888	15.4% ±1.2	13.8% ±0.2	12.5% ±0.1
Under 18	7,842 ±865	26.0% ±2.6	18.8% ±0.4	16.1% ±0.1
18 to 59	11,642 ±1,082	14.3% ±1.3	12.7% ±0.2	11.6% ±0.1
60 and over	4,942 ±500	10.6% ±1.0	11.4% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Sullivan County, ACS 2020–2024
Measure	Sullivan County	Tennessee	United States
Housing units	76,324 ±125	3,143,670 ±903	143,775,355 ±10,234
Occupied	90.3% ±1.0	89.8% ±0.2	89.9% ±0.1
Vacant	9.7% ±1.0	10.2% ±0.2	10.1% ±0.1
Owner occupied	72.1% ±1.3	66.9% ±0.3	65.2% ±0.3
Renter occupied	27.9% ±1.3	33.1% ±0.3	34.8% ±0.1
Median home value	$213,300 ±$6,300	$286,700 ±$1,492	$332,700 ±$236
Median gross rent	$889 ±$29	$1,189 ±$7	$1,413 ±$2
Median year built	1977 ±1	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 Sullivan County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Tennessee	United States
Hispanic or Latino	4,217 ±0	2.6% ±<0.1	7.4% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	147,130 ±374	91.6% ±0.2	71.0% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	3,263 ±337	2.0% ±0.2	15.4% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	1,204 ±222	0.7% ±0.1	1.9% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	175 ±68	0.1% ±<0.1	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 33	0% to < 0.1%	0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	183 to 667	0.1% to 0.4%	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	4,210 ±498	2.6% ±0.3	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 Sullivan County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Tennessee	United States
Born in the state	95,272 ±1,828	59.3% ±1.1	57.2% ±0.2	57.3% ±<0.1
Born in another state	61,465 ±1,793	38.3% ±1.1	35.7% ±0.2	26.9% ±<0.1
Born a citizen outside the states	886 ±224	0.6% ±0.1	1.0% ±<0.1	1.7% ±<0.1
Born abroad	3,001 ±441	1.9% ±0.3	6.1% ±0.1	14.1% ±<0.1
Naturalized citizens	1,474 ±245	0.9% ±0.2	2.4% ±0.1	7.4% ±<0.1
Not citizens	1,527 ±417	1.0% ±0.3	3.7% ±0.1	6.8% ±<0.1

Sullivan County among the counties of Tennessee

10th of 95 by population, July 2025. Every one is listed on the Tennessee page.

Counties of Tennessee near Sullivan County in population, July 2025
County	July 2025	Change since 2020
Rutherford County	386,352	+12.5%
Williamson County	272,061	+9.0%
Montgomery County	249,935	+12.9%
Sumner County	215,538	+9.2%
Wilson County	175,033	+17.7%
Sullivan County	163,759	+3.5%
Blount County	143,820	+6.0%
Washington County	141,199	+6.0%
Maury County	118,131	+16.0%
Bradley County	115,465	+6.1%
Sevier County	101,342	+2.5%

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