Census-designated place · Tennessee
Karns, Tennessee
Karns, census-designated place, in Knox County, Tennessee. Karns had 3,536 residents in the 2020 Census, a full count; the ACS 2020-2024 5-year estimates put it at 4,115 (±743). GEOID 4738800.
Residents, 2020 Census
3,536
Census count or controlled total
ACS 2020-2024 estimate: 4,115 ±743
Median household income
$100,043
±$10,659 (90% margin)
Tennessee: $69,595
Median home value
$328,600
±$19,977 (90% margin)
Tennessee: $286,700
Median gross rent
$1,765
±$225 (90% margin)
Tennessee: $1,189
Where is Karns and what county is it in?
Karns is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Knox County, Tennessee. It covers 3.0 square miles of land, 1,185 residents per square mile in 2020.
Karns is in the Knoxville, TN metropolitan statistical area, which takes in 9 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Karns, and is it growing?
The 2020 Census counted 3,536 residents in Karns, a full count rather than a sample. The 2020-2024 American Community Survey, a sample, estimates 4,115 (±743).
The Census Bureau publishes yearly population estimates for incorporated places only; Karns is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Karns | Knox County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 4,115 ±743 | 494,148 | – |
| Households | 1,507 ±275 | 201,146 | – |
| Average household size | 2.73 ±0.34 | 2.39 | – |
| Housing units | 1,519 ±273 | 218,661 | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Karns?
The median resident of Karns is 33.6 years old; 30.8% are under 18 and 19.4% are 65 or older. The largest group is non-Hispanic white residents at 86.7%, then non-Hispanic residents of two or more races at 4.4%.
| Measure | Karns | Knox County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 33.6 ±6.7 | 37.4 | – |
| Under 18 years | 30.8% ±5.7 pts | 20.9% | – |
| 65 years and over | 19.4% ±6.9 pts | 16.3% | – |
| Male | 41.6% ±5.4 pts | 49.0% | – |
| Hispanic or Latino (any race) | 3.9% ±2.8 pts | 6.3% | – |
| White alone, not Hispanic | 86.7% ±6.2 pts | 79.1% | – |
| Black or African American alone, not Hispanic | 2.9% ±4.3 pts | 8.0% | – |
| Asian alone, not Hispanic | 1.2% ±1.7 pts | 2.3% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.1 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.1 pts | 0.1% | – |
| Two or more races, not Hispanic | 4.4% ±3.7 pts | 3.7% | – |
| Some other race alone, not Hispanic | 0.8% ±1.1 pts | 0.4% | – |
| Born outside the United States | 1.6% ±1.3 pts | 6.5% | – |
| Speak a language other than English at home (age 5+) | 2.5% ±1.7 pts | 8.7% | – |
| Civilian veterans (age 18+) | 4.2% ±3.2 pts | 6.7% | – |
| With a disability | 9.2% ±4.1 pts | 12.1% | – |
| No health insurance coverage | 3.9% ±2.4 pts | 8.3% | – |
| High school graduate or higher (age 25+) | 95.1% ±3.3 pts | 92.4% | – |
| Bachelor's degree or higher (age 25+) | 43.5% ±6.9 pts | 41.0% | – |
| Graduate or professional degree (age 25+) | 13.8% ±7.1 pts | 16.2% | – |
| Lived in the same house a year earlier | 86.5% ±7.4 pts | 86.4% | – |
| Moved from another state in the past year | 0.6% ±0.7 pts | 3.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Karns earn?
Half of Karns's 1,507 households earn less than $100,043 a year (±$10,659), against $74,222 in Knox County and $69,595 in Tennessee.
| Measure | Karns | Knox County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $100,043 ±$10,659 | $74,222 | – |
| Mean household income | $103,873 ±$12,125 | $104,460 | – |
| Per capita income | $38,335 ±$6,730 | $43,351 | – |
| People below the poverty line | 3.8% ±3.0 pts | 12.2% | – |
| Children under 18 below the poverty line | 5.8% ±6.7 pts | 13.9% | – |
| Households receiving SNAP | 2.7% ±3.3 pts | 8.9% | – |
| Households with a computer | 96.0% ±5.4 pts | 95.5% | – |
| Households with a broadband subscription | 92.6% ±6.0 pts | 89.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Karns?
Owners occupy 77.4% of Karns's occupied homes and renters 22.6%. The median owner-occupied home is valued at $328,600 by its owner (±$19,977). The median renter pays $1,765 a month including utilities.
| Measure | Karns | Knox County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $328,600 ±$19,977 | $320,900 | – |
| Median gross rent | $1,765 ±$225 | $1,261 | – |
| Renters paying 35% or more of income on rent | 10.7% ±12.8 pts | 41.0% | – |
| Median monthly owner costs, with a mortgage | $1,814 ±$131 | $1,589 | – |
| Owner-occupied homes | 77.4% ±11.6 pts | 65.2% | – |
| Renter-occupied homes | 22.6% ±11.6 pts | 34.8% | – |
| Housing units | 1,519 ±273 | 218,661 | – |
| Homeowner vacancy rate | 0.0% ±3.8 pts | 1.0% | – |
| Rental vacancy rate | 0.0% ±12.3 pts | 5.5% | – |
| Single-family detached homes | 85.1% ±10.4 pts | 65.9% | – |
| Mobile homes | 3.3% ±3.0 pts | 3.6% | – |
| Built 2020 or later | 2.2% ±3.2 pts | 2.9% | – |
| Built 2010 to 2019 | 27.8% ±9.9 pts | 11.0% | – |
| Built 1939 or earlier | 3.1% ±3.3 pts | 6.8% | – |
| Households with no vehicle | 3.1% ±3.0 pts | 5.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Karns work and get to work?
71.5% of Karns's workers drive alone and 20.7% work from home. The average trip to work takes 26.2 minutes.
| Measure | Karns | Knox County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 63.9% ±7.5 pts | 65.0% | – |
| Unemployment rate | 9.5% ±10.3 pts | 3.5% | – |
| Drove alone to work | 71.5% ±9.0 pts | 75.8% | – |
| Carpooled | 7.8% ±5.2 pts | 6.7% | – |
| Public transportation | 0.0% ±2.6 pts | 0.5% | – |
| Walked | 0.0% ±2.6 pts | 1.6% | – |
| Worked from home | 20.7% ±8.1 pts | 14.4% | – |
| Mean travel time to work | 26.2 min ±3.1 | 22.2 min | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Karns?
No census tract lies mostly in Karns; 3 tracts reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 60.01Knox County | 4,553 | $99,890 |
| Tract 60.02Knox County | 6,288 | $75,806 |
| Tract 59.08Knox County | 5,392 | $70,147 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Karns) · Census block assignment files
How does Karns compare with other places in Tennessee?
Karns ranks 34th of 287 places in Tennessee with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 134th | 289 |
| Residents per square mile | 48th | 289 |
| Median household income | 34th | 287 |
| Per capita income | 71st | 289 |
| Median home value | 54th | 285 |
| Median gross rent | 17th | 265 |
| Bachelor's degree or higher | 30th | 276 |
| Median age | 258th | 289 |
| Owner-occupied share | 96th | 289 |
| Work from home | 26th | 167 |
| Travel time to work | 132nd | 288 |
Karns's figures with every place in Tennessee (CSV)
Every place in Tennessee, sortable · Compare Karns with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Karns?
25 of the 57 figures for Karns on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Karns are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.