ZIP Code Tabulation Area · Tennessee

ZIP Code 37921: Knoxville, TN

ZIP Code 37921 (Knoxville, Knox County, Tennessee) has an estimated 28,717 residents in 11,634 households. The median household income is $60,013, the median home value is $226,300 and the median gross rent is $1,233/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated

Total population

28,717

Margin of error ±1,777

Median household income

$60,013

Margin of error ±$5,863

Median home value

$226,300

Margin of error ±$9,937

Median gross rent

$1,233/mo

Margin of error ±$71

Median age

34.6 yrs

Margin of error ±1.3 yrs

Mean travel time to work

20.0 min

Margin of error ±2.5 min

How ZIP 37921 compares with Tennessee and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 3792134.6 yrsTennessee38.9 yrsUnited States38.9 yrs

Median household income

ZIP 37921$60,013Tennessee$69,595United States$80,734

Per capita income

ZIP 37921$30,928Tennessee$39,437United States$44,673

Poverty rate

ZIP 3792117.2%Tennessee13.8%United States12.5%

Unemployment rate

ZIP 379213.9%Tennessee4.7%United States5.2%

Bachelor's degree or higher

ZIP 3792126.3%Tennessee31.1%United States35.7%

Median home value

ZIP 37921$226,300Tennessee$286,700United States$332,700

Median gross rent

ZIP 37921$1,233/moTennessee$1,189/moUnited States$1,413/mo

Owner-occupied homes

ZIP 3792159.8%Tennessee66.9%United States65.2%

Mean travel time to work

ZIP 3792120.0 minTennessee25.7 minUnited States26.4 min

Worked from home

ZIP 3792111.5%Tennessee12.9%United States15.1%

All figures for ZIP 37921

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 37921 — ACS 2020–2024 5-year estimates
MeasureZIP 37921Margin of errorTennesseeUnited States
Total population28,717±1,7777,066,383334,922,499
Median age34.6 yrs±1.3 yrs38.9 yrs38.9 yrs
Households11,634±6602,824,277129,227,496
Median household income$60,013±$5,863$69,595$80,734
Per capita income$30,928±$2,090$39,437$44,673
Poverty rate17.2%±3.4 pts13.8%12.5%
Unemployment rate3.9%±1.0 pts4.7%5.2%
Bachelor's degree or higher26.3%±3.0 pts31.1%35.7%
Median home value$226,300±$9,937$286,700$332,700
Median gross rent$1,233/mo±$71$1,189/mo$1,413/mo
Owner-occupied homes59.8%±2.9 pts66.9%65.2%
Mean travel time to work20.0 min±2.5 min25.7 min26.4 min
Worked from home11.5%±2.4 pts12.9%15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 37921
GroupZIP 37921TennesseeUnited States
White alone, not Hispanic or Latino63.8%71.0%57.4%
Black or African American alone, not Hispanic or Latino20.1%15.4%11.9%
American Indian and Alaska Native alone, not Hispanic or Latino0.0%0.1%0.5%
Asian alone, not Hispanic or Latino0.9%1.9%5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino0.0%0.1%0.2%
Some other race alone, not Hispanic or Latino0.1%0.4%0.6%
Two or more races, not Hispanic or Latino4.6%3.7%4.3%
Hispanic or Latino (of any race)10.4%7.4%19.3%

Where ZIP 37921 is

State
Tennessee
Main county
Knox County
Largest overlapping place
Knoxville (78% of the ZIP's land area)
Land area
15.90 sq mi· about 1,806 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Knox County

37721 Knox County, TN37806 Mascot, TN37849 Powell, TN37871 Knox County, TN37902 Knoxville, TN37909 Knoxville, TN37912 Knoxville, TN37914 Knoxville, TN37915 Knoxville, TN37916 Knoxville, TN37917 Knoxville, TN37918 Knoxville, TN37919 Knoxville, TN37920 Knoxville, TN37922 Knox County, TN37923 Knoxville, TN37924 Knox County, TN37931 Knox County, TN37932 Knox County, TN37934 Farragut, TN37938 Knox County, TN

See every ZIP code in Tennessee, or compare ZIP 37921 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

  • U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
  • U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
  • Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.