Zip Code 37921
Knoxville, Tennessee — Knox County
📍 ZIP code 37921 is in Knoxville, Knox County, Tennessee.
ZIP code 37921 is located in Knoxville, Knox County, Tennessee. It is a zip code in the Central (CST/CDT) Time Zone with an estimated population of 29,064. The area code for ZIP code 37921 is 423.
Quick Answer
Zip code 37921 is in Knoxville, Tennessee (Knox County). It has a population of 29,064, median household income of $57,813, and median home value of $204,300.
Population
29,064
Income
$57,813
Home Value
$204,300
Climate
88°F / 26°F
About Zip Code 37921
Zip code 37921 is located in Knoxville, Tennessee, within Knox County. Home to approximately 29,064 residents, this area sits at an elevation of 981 ft and falls within the Central (CST/CDT) timezone. The local area code is 423.
The median household income is $57,813 per year, which is below the national median of $70,784. Homes in this zip code have a median value of $204,300, and the cost of living index is 67 (33% below the national average of 100).
Summers average a high of 88°F while winters drop to 26°F. The area receives about 56 in of rain and 6 in of snow annually. The zip code covers 15.3 square miles of land area.
Key Statistics
29,064
$57,813
$204,300
Central (CST/CDT)
423
981 ft
15.3 sq mi
34
12,969
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Compare With Nearby Zip Codes
| Metric | 37921 | 37912 | 37909 | 37916 | 37919 | 37902 |
|---|---|---|---|---|---|---|
| City | Knoxville, TN | Knoxville, TN | Knoxville, TN | Knoxville, TN | Knoxville, TN | Knoxville, TN |
| Population | 29,064 | 22,009 | 16,848 | 14,771 | 31,401 | 2,308 |
| Median Income | $57,813 | $44,754 | $61,365 | $17,982 | $71,863 | $56,397 |
| Home Value | $204,300 | $185,600 | $273,900 | $270,000 | $453,000 | $570,700 |
| Cost of Living | 67 | 60 | 84 | 62 | 128 | 139 |
| Median Age | 34 | 35.6 | 36.4 | 20.6 | 39 | 35.2 |
Cost of Living
100 = National Average. Knoxville's cost of living is 33% below the national average.
vs. State Avg
Below
Affordability
Very Affordable
Income-to-Home
3.5x
Demographics
Zip code 37921 has a population of 29,064 people with a median age of 34. There are 12,969 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Knoxville (37921) population trend from 2010 to 2024
↑ 28.9%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
88°F
26°F
56 in
6 in
Knoxville experiences warm summers with average highs around 88°F. Winters are cool with lows averaging 26°F. The area receives about 6 in of snow per year.
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Housing & Economy
Median Home Value
$204,300
Median Household Income
$57,813
With 12,969 housing units across 15.3 square miles, 37921 has a housing density of 848 units per square mile. The home price-to-income ratio is 3.5x.
Location & Geography
Latitude
35.9789°
Longitude
-84.0029°
Land Area
15.3 sq mi
Water Area
0 sq mi
Nearby Zip Codes
Zip codes closest to 37921 (Knoxville, TN) with distances:
All Zip Codes in Knoxville, TN
Other zip codes serving Knoxville:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 37921's $57,813. A way to compare Knoxville to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 37921 (Knoxville, TN). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Knoxville, Tennessee?
Knoxville, Tennessee uses zip code 37921 along with 10 other zip codes.
What county is zip code 37921 in?
Zip code 37921 is located in Knox County, Tennessee.
What is the population of zip code 37921?
The population of zip code 37921 is 29,064 with a median age of 34.
Is 37921 in Knoxville, Tennessee?
Yes, zip code 37921 is in Knoxville, Knox County, Tennessee. The area code is 423.
Frequently Asked Questions
What city is zip code 37921 in?
Zip code 37921 is in Knoxville, Tennessee. It is part of Knox County and uses the Central (CST/CDT) timezone.
What is zip code 37921?
Zip code 37921 is a U.S. postal code in Knoxville, Tennessee (Knox County). It has a population of 29,064 and covers 15.3 square miles.
What is the population of zip code 37921?
The population of zip code 37921 (Knoxville, TN) is 29,064 with a median age of 34. There are approximately 12,969 housing units in this area.
What is the median income in zip code 37921?
The median household income in zip code 37921 (Knoxville, TN) is $57,813 per year. The cost of living index is 67 (100 = national average).
What is the average home price in zip code 37921?
The median home value in zip code 37921 (Knoxville, TN) is $204,300. The cost of living index is 67 compared to the national average of 100.
What county is zip code 37921 in?
Zip code 37921 is located in Knox County, Tennessee. The primary city is Knoxville.
What is the area code for zip code 37921?
Zip code 37921 in Knoxville, TN uses area code 423. It is located in the Central (CST/CDT) timezone.
Is zip code 37921 a good place to live?
Zip code 37921 (Knoxville, TN) has a cost of living index of 67 (100 = national average), a median household income of $57,813, and median home values of $204,300. The median age is 34. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 37921?
The cost of living index for zip code 37921 (Knoxville, TN) is 67, where 100 represents the national average. This area is below the national average. Median home value: $204,300.
What schools serve zip code 37921?
Zip code 37921 in Knoxville, Tennessee is served by the local school district of Knox County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.