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ZIP Code 37931
Karns, TN, Knox County
Population
31,842
Land area
28.4sq mi
People per sq mi
1,123
City
Karns
ZIP 37931 and nearby ZIP codes
ZIP 37931 at a glance
- ZIP 37931 (Karns) is about 6.5 times as dense as Tennessee as a whole.
- Households here earn a median of $92,150 a year, 32% more than the Tennessee figure of $69,595.
- A typical owner-occupied home is valued at $359,600 (25% above Tennessee) and median rent is $1,542 a month.
Local data for ZIP 37931
Counts from official public data
Housing and community stats
ZIP 37931, American Community Survey 2020-2024
Median household income
$92,150
Poverty rate
7.1%
Median home value
$359,600
Prices +5.7% in a year
Median rent
$1,542/mo
Homeownership
71.3%
Bachelor's or higher
47.0%
Median age
37.7
Average commute
22.5 min
Economy and federal money
Businesses, pandemic loans and political donations
Business establishments
409
ZIP Business Patterns 2023
Employees
7,075
$375M annual payroll
PPP loans
$30.7M
464 loans
Campaign donations
$103K
39% D, 30% R, 2026 cycle
Environment and hazard risk
ZIP 37931, 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 ZIP 37931, CDC PLACES estimates
Obesity
32.9%
U.S. 33.3% about the same
Diabetes
11.0%
U.S. 12.1% -1.1 pts
Smoking
14.4%
U.S. 12.8% +1.6 pts
Uninsured (18-64)
9.0%
U.S. 11.1% -2.1 pts
Frequently asked questions
- What city is ZIP code 37931?
- ZIP code 37931 is in Karns, TN (Knox County).
- What county is ZIP code 37931 in?
- ZIP code 37931 is mostly in Knox County, Tennessee.
- How many people live in ZIP code 37931?
- About 31,842 people live in the 37931 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.
Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.