37921 ZIP Code — Knoxville, TN
Knox County, Tennessee
ZIP code 37921 is located in Knoxville, Tennessee, within Knox County. It covers approximately 15.90 square miles and serves a population of 28,571 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 865.
About ZIP code 37921
The housing stock consists of a mix of housing types. Most homes were built in the 1970s, giving the area an established character. Median home value is $172,300. Owner-occupancy sits near the national average at 62%.
Median household income is $55,517.
The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 22 minutes is near the national average.
Educational attainment is near the national average, with 27% of residents holding a bachelor's degree or higher.
Health indicators show elevated rates of smoking (24%) compared to national benchmarks.
28,571
population
15.90
sq mi land
Standard
ZIP type
Eastern (ET)
timezone
37921 ZIP code map
Cities in ZIP code 37921
Below are the cities the US Postal Service accepts for ZIP code 37921. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Knoxville | Preferred |
Nearby ZIP codes
37912 Knoxville (1.7 mi)
37909 Knoxville (2.8 mi)
37916 Knoxville (4 mi)
37902 Knoxville (4.3 mi)
37929 Knoxville (4.4 mi)
37996 Knoxville (4.4 mi)
37995 Knoxville (4.4 mi)
37997 Knoxville (4.4 mi)
37919 Knoxville (4.6 mi)
37917 Knoxville (4.6 mi)
37915 Knoxville (5.3 mi)
37923 Knoxville (6.5 mi)
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 28,571 |
| Population density | 1,797 / sq mi |
| State FIPS | 47 |
| County FIPS | 093 |
| Geography | |
|---|---|
| Land area | 15.90 sq mi |
| Water area | 0.01 sq mi |
| Latitude | 35.9849 |
| Longitude | -83.9928 |
| Timezone | Eastern (ET) |
| Area code | 865 |
Total population by age
Gender
Race & ethnicity
Economics
updated 05/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 50.0% | 42.5% | 45.7% |
| $50k – $100k | 32.5% | 31.1% | 30.9% |
| $100k – $200k | 16.1% | 20.2% | 18.3% |
| Over $200k | 1.5% | 6.3% | 5.1% |
Demographics & statistics
28,571
Population
1,797
People per sq mi
34.8
Median age
$55,517
Median household income
$28,924
Per capita income
$172,300
Median home value
$1,083
Median monthly rent
61.7%
Home ownership
16.9%
Poverty rate
4.1%
Unemployment
8,198
Housing units
26.9%
Bachelor's or higher
Age distribution
Male
Female
912
Under 5
969
891
5–9
946
1,017
10–14
1,080
903
15–19
960
813
20–24
864
2,427
25–34
2,579
1,709
35–44
1,816
1,783
45–54
1,894
802
55–59
852
749
60–64
796
1,176
65–74
1,250
547
75–84
581
124
85+
131
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 7,036 | 24.6% |
| 18 and over | 21,535 | 75.4% |
| 65 and over | 3,809 | 13.3% |
| Median age | 34.8 years | |
Race & ethnicity
White
62.5%
Black or African American
19.4%
Two or more races
7.8%
Hispanic or Latino
6.6%
Other race
2.6%
Asian
0.8%
American Indian / Alaska Native
0.3%
| Group | Count | % |
|---|---|---|
| White | 19,137 | 62.5% |
| Black or African American | 5,932 | 19.4% |
| Two or more races | 2,392 | 7.8% |
| Hispanic or Latino | 2,024 | 6.6% |
| Other race | 791 | 2.6% |
| Asian | 239 | 0.8% |
| American Indian / Alaska Native | 80 | 0.3% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 50.0% | 42.5% | 45.7% |
| $50k – $100k | 32.5% | 31.1% | 30.9% |
| $100k – $200k | 16.1% | 20.2% | 18.3% |
| Over $200k | 1.5% | 6.3% | 5.1% |
Under $10k
7.6%
$10k–$15k
3.4%
$15k–$25k
9.2%
$25k–$35k
9.6%
$35k–$50k
15.2%
$50k–$75k
19.5%
$75k–$100k
11.0%
$100k–$150k
16.6%
$150k–$200k
4.5%
$200k+
3.4%
| Range | % of households |
|---|---|
| Under $10k | 7.6% |
| $10k–$15k | 3.4% |
| $15k–$25k | 9.2% |
| $25k–$35k | 9.6% |
| $35k–$50k | 15.2% |
| $50k–$75k | 19.5% |
| $75k–$100k | 11.0% |
| $100k–$150k | 16.6% |
| $150k–$200k | 4.5% |
| $200k+ | 3.4% |
| Median income | $55,517 |
Housing
Home values
Under $50k
6.1%
$50k–$100k
8.5%
$100k–$150k
18.5%
$150k–$200k
30.2%
$200k–$300k
25.4%
$300k–$500k
9.5%
$500k–$1M
1.3%
$1M+
0.6%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $172,300 |
| Median rent / month | $1,083 |
| Owner occupied | 61.7% |
| Renter occupied | 38.3% |
| Vacant | 10.0% |
| Single-family detached | 70.0% |
| Large apartment buildings | 2.4% |
| Mobile homes | 3.3% |
| Median rooms | 5.4 |
| Avg household size (owned) | 2.60 |
Year built
| Era | % |
|---|---|
| 2020 or later | 1.1% |
| 2010–2019 | 3.6% |
| 2000–2009 | 13.6% |
| 1990–1999 | 15.3% |
| 1980–1989 | 12.4% |
| 1970–1979 | 15.5% |
| 1960–1969 | 10.7% |
| 1950–1959 | 10.2% |
| 1940–1949 | 8.4% |
| 1939 or earlier | 9.2% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 1.5% |
| 1 bedroom | 3.6% |
| 2 bedrooms | 32.4% |
| 3 bedrooms | 49.1% |
| 4 bedrooms | 11.5% |
| 5+ bedrooms | 2.0% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 5.9% |
| 1 vehicle | 34.3% |
| 2 vehicles | 38.1% |
| 3 or more | 21.7% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 23.8% |
| Electricity | 75.2% |
| Propane / LP gas | 0.6% |
| Fuel oil | 0.1% |
| No fuel used | 0.2% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 4,760 | 42.3% |
| Cohabiting couple | 809 | 7.2% |
| Male householder, no spouse | 2,018 | 17.9% |
| Female householder, no spouse | 3,669 | 32.6% |
| Households with children under 18 | 3,900 | 34.6% |
| Households with seniors (65+) | 3,096 | 27.5% |
| Average household size | 2.53 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 35.2% | 30.3% |
| Married | 47.8% | 45.0% |
| Separated | 1.6% | 2.0% |
| Widowed | 2.9% | 9.3% |
| Divorced | 12.5% | 13.5% |
Education
Less than 9th grade
5.4%
Some HS, no diploma
7.5%
HS graduate
29.4%
Some college, no degree
20.4%
Associate's degree
10.4%
Bachelor's degree
18.3%
Graduate / professional
8.5%
| Metric | % |
|---|---|
| HS diploma or higher | 87.1% |
| Bachelor's or higher | 26.9% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 414 | 5.7% |
| Kindergarten | 355 | 4.9% |
| Elementary school | 3,157 | 43.1% |
| High school | 1,702 | 23.3% |
| College / grad school | 1,691 | 23.1% |
Employment
Industry of employment
Education & healthcare
22.0%
Arts, food & hospitality
13.7%
Professional & management
12.3%
Manufacturing
10.1%
Retail trade
9.7%
Construction
8.0%
Transportation & utilities
7.0%
Finance & real estate
5.5%
Other services
3.3%
Public administration
3.0%
Wholesale trade
2.8%
Information
2.4%
Agriculture & mining
0.2%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 36.7% |
| Service | 20.9% |
| Sales & office | 19.8% |
| Natural resources & construction | 7.9% |
| Production & transportation | 14.8% |
Employment type
| Type | % |
|---|---|
| Private sector | 82.1% |
| Government | 14.0% |
| Self-employed | 3.4% |
| Unpaid family workers | 0.5% |
Commute
| Method | % |
|---|---|
| Drive alone | 77.8% |
| Carpool | 11.2% |
| Public transit | 1.2% |
| Walk | 0.8% |
| Work from home | 8.3% |
| Other means | 0.9% |
| Avg commute (minutes) | 21.6 |
Poverty
All people
16.9%
Under 18 years
25.5%
18 and over
14.1%
Married-couple families
5.1%
Female-led households
38.2%
Income support
| Source | % of households |
|---|---|
| Social Security | 29.6% |
| Retirement income | 18.9% |
| Supplemental Security | 6.5% |
| Cash public assistance | 3.6% |
| Food stamps / SNAP | 16.9% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 38.4% |
| High blood pressure | 37.0% |
| High cholesterol | 32.1% |
| Diabetes | 12.4% |
| Heart disease | 6.4% |
| Stroke | 3.5% |
| Asthma | 11.8% |
| Arthritis | 27.0% |
| Kidney disease | 3.0% |
| Pulmonary disease | 8.7% |
| Cancer | 5.5% |
| Behavior / access | % |
|---|---|
| Smoking | 24.3% |
| Binge drinking | 15.0% |
| No physical activity | 27.0% |
| Less than 7 hrs sleep | 37.2% |
| Depression | 28.3% |
| Fair or poor health | 19.0% |
| Poor mental health | 19.2% |
| Poor physical health | 12.4% |
| No health insurance | 18.6% |
| Visited doctor (checkup) | 74.8% |
| Visited dentist | 52.8% |
| Cholesterol screening | 88.4% |
| Teeth loss | 19.7% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 1,790 | 8.3% |
| Disability | % |
|---|---|
| Any disability | 15.8% |
| Under 18 | 7.3% |
| 18–64 years | 13.4% |
| 65 and over | 42.3% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 63.5% |
| Public insurance | 38.2% |
| No insurance | 9.0% |
| Uninsured under 19 | 1.6% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 26,690 | 93.4% |
| Spanish | 1,022 | 3.8% |
| Other Indo-European | 726 | 2.7% |
| Asian & Pacific Islander | 48 | 0.2% |
| Other languages | 6 | 0.0% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 26,740 | 93.6% |
| Born in same state | 26,397 | 92.4% |
| Born in different state | 18,298 | 64.0% |
| Foreign born | 343 | 1.2% |
| Naturalized citizen | 1,831 | 6.4% |
| Not a US citizen | 862 | 47.1% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Arab | 3,980 | 13.9% |
| French | 3,296 | 11.5% |
| Italian | 2,411 | 8.4% |
| English | 351 | 1.2% |
| German | 69 | 0.2% |
| Ancestry | Count | % |
|---|---|---|
| Irish | 41 | 0.1% |
| Polish | 39 | 0.1% |
| Norwegian | 19 | 0.1% |
| Dutch | 18 | 0.1% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 39.4% |
| Internet access | 94.3% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 37921
What city is ZIP code 37921 in?
ZIP code 37921 is primarily assigned to Knoxville, Tennessee.
What county is ZIP code 37921 in?
ZIP code 37921 falls within Knox County, Tennessee.
What is the poverty rate in ZIP code 37921?
17% of residents in ZIP code 37921 live below the poverty line, above the national average.
What is the typical home value in ZIP code 37921?
The median home value in ZIP code 37921 is $172,300.
What is the population of ZIP code 37921?
ZIP code 37921 has an estimated population of 28,571 residents, with a density of 1,797 people per square mile.
What is the median household income in ZIP code 37921?
The median household income in ZIP code 37921 is $55,517, below the national median of ~$75,000.
What timezone is ZIP code 37921 in?
ZIP code 37921 observes the EST timezone.