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Karns, TN
Census-designated place in Knox County, Tennessee. ZIP codes: 37931.
Population
4,115
Land area
3sq mi
People per sq mi
1,378
ZIP codes
1
Karns and its ZIP codes
Karns at a glance
- Karns is about 8 times as dense as Tennessee as a whole.
- The median household income is $100,043, 44% above the Tennessee median of $69,595.
- A typical owner-occupied home is valued at $328,600 (15% above Tennessee) and median rent is $1,765 a month.
Local data for Karns, TN
Counts from official public data
Housing and community stats
Karns, TN, American Community Survey 2020-2024
Median household income
$100,043
Poverty rate
3.8%
Median home value
$328,600
Median rent
$1,765/mo
Homeownership
77.4%
Bachelor's or higher
43.5%
Median age
33.6
Average commute
26.2 min
Largest reported origins and ancestries: German Americans (455), Irish Americans (382), Italian Americans (144).
Economy and federal money
Jobs, pay, income and spending are for Knox County. PPP loans are for Karns.
Unemployment rate
3.2%
Aug 2026, +0.1 pts in a year
Average annual pay
$67,249
262,703 jobs, 2025
Income per person
$72,840
BEA, 2024
Federal spending
$3.6B
FY 2026, $7,510 per person
How people get to work
Karns, TN, workers 16 and older. American Community Survey 5-year estimates
- Drove alone71.5%
- Carpooled7.8%
- Public transit0.0%
- Walked0.0%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other0.0%
- Worked from home20.7%
Average one-way commute: 26.2 minutes for people who do not work from home.
Environment and hazard risk
Karns, TN, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Moderate
Top: lightning
Storm events since 1996
788
Countywide, mostly thunderstorm wind
Flood insurance policies
772
0.5% of homes, county
July high / Jan low
89° / 30°F
55.5 inches of rain a year
Health statistics
Share of adults in Karns, TN, CDC PLACES estimates
Obesity
33.3%
U.S. 33.3% about the same
Diabetes
11.2%
U.S. 12.1% -0.9 pts
Smoking
15.5%
U.S. 12.8% +2.7 pts
Uninsured (18-64)
9.1%
U.S. 11.1% -2.0 pts
ZIP codes in Karns
1 in or overlapping Karns. Population shown
Cities near Karns
| Name | Distance | Land area (sq mi) |
|---|---|---|
| PowellCensus-designated place | 6.1 mi | 8.5 |
| FarragutTown | 8.5 mi | 16 |
| KnoxvilleCity | 9 mi | 98.7 |
| ClintonCity | 9.4 mi | 11.6 |
| Oak RidgeCity | 11 mi | 85.2 |
| LouisvilleCity | 11 mi | 14.9 |
| HallsCensus-designated place | 13 mi | 8.8 |
| AlcoaCity | 13 mi | 14.9 |
| RockfordCity | 14 mi | 3.4 |
| Oliver SpringsTown | 14 mi | 5.8 |
| Lenoir CityCity | 14 mi | 8.6 |
| BricevilleCensus-designated place | 14 mi | 0.5 |
| FriendsvilleCity | 15 mi | 2.8 |
| AndersonvilleCensus-designated place | 16 mi | 1.6 |
| NorrisCity | 16 mi | 8.3 |
| John SevierCensus-designated place | 16 mi | 0.8 |
Frequently asked questions
- What county is Karns, TN in?
- Karns is in Knox County, Tennessee.
- What ZIP codes are in Karns, TN?
- ZIP codes in or overlapping Karns include 37931.
- What is the population of Karns, TN?
- About 4,115 people live in Karns, based on American Community Survey 5-year estimates.
- What cities are near Karns?
- Nearby places include Powell (6.1 mi), Farragut (8.5 mi), Knoxville (9 mi), Clinton (9.4 mi), Oak Ridge (11 mi).
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023