PlainZIP

Knoxville, TN · standard

ZIP Code 37921

Knox County, Tennessee - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

28,233
712/sq mi
$60,013
Median income
$226,300
Median home value
26.3%
Bachelor's or higher

The verdict

Knoxville pairs a below-median household income with above-median home values, in a low-density, mixed-tenure area.

29th pct
household income, US ZIPs
Top 49%
home value, US ZIPs
712
people per sq mi
60%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 37921 against every reporting US ZIP.

ZIP code 37921 is a densely settled ZIP (a standard USPS delivery area) in Knoxville, Knox County, Tennessee, with 28,233 residents across 39.7 square miles, a density of 712 people per square mile, in the New York time zone.

ZIP 37921 reports a modest median household income of $60,013 (10% below the Tennessee average), while per-capita income is $30,928. 17.2% of residents live below the poverty line, and the unemployment rate reads 3.9%. Housing costs here run $226,300 for a typical home value (9% below the state average), with rent averaging $1,233 a month; 59.8% of homes are owner-occupied.

Educational attainment sits below the national norm: 26.3% of adults hold a bachelor's degree or higher, the median age is 34.6, and the average commute is 20 minutes. A geography-based comparison follows: 10 ZIP codes within about 10 miles of 37921, plus 6 more within Knox County, give a clearer read than the national average alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 37921

Top 5 sectors by establishment count in Knoxville, TN

Which industries have the most business establishments in ZIP 37921.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 37921, Knoxville, TN · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

28,233

Population

39.7

Area (sq mi)

712

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 37921?

34.6

Median Age

47.4%

Male

52.6%

Female

7.0%

Foreign-Born

White 64.3%
African American 20.1%
Asian 0.9%
American Indian or Alaska Native 0.3%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 11.6%
Hispanic or Latino 10.4%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$60,013

Median Household Income

-10% vs state

$30,928

Per Capita Income

17.2%

Poverty Rate

3.9%

Unemployment Rate

20.0 min

Mean Commute Time

How ZIP 37921 ranks nationally

Knoxville, TN household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$60,013 29th percentile higher than 29% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). This entry sits in this band. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 56.1%
Bachelor's Degree or Higher 26.3%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

12,957

Total Housing Units

11,634

Occupied Units

1,323

Vacant Units

2.46

Avg Household Size

Occupancy Type

Owner 59.8%
Renter 40.2%

$226,300

Median Home Value

-9% vs state

$1,233

Median Rent

1978

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+7.4%

YoY Change (2024)

348

HPI Index (2000 = 100)

+248%

Total Change Since 2000

Home values in ZIP 37921 have increased 7.4% over the past year (2024). Since 2000, this ZIP has seen +248% cumulative appreciation.

Year Annual Change HPI Index
2020 +7.1% 190
2021 +19.1% 227
2022 +24.5% 282
2023 +14.8% 324
2024 +7.4% 348

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 703 business establishments in ZIP 37921, employing approximately 26,636 people with a combined annual payroll of $1,278,384,000.

703

Businesses

26,636

Employees

$1.3B

Annual Payroll

16

Industry Sectors

Industry Establishments % of Total
Wholesale trade 100 14.2%
Retail trade 94 13.4%
Construction 79 11.2%
Manufacturing 60 8.5%
Other services (except public administration) 55 7.8%
Health care and social assistance 51 7.3%
Transportation and warehousing 48 6.8%
Administrative and support and waste management and remediation services 48 6.8%
Professional, scientific, and technical services 42 6.0%
Real estate and rental and leasing 40 5.7%
Accommodation and food services 32 4.5%
Finance and insurance 21 3.0%
Information 11 1.6%
Management of companies and enterprises 11 1.6%
Arts, entertainment, and recreation 6 0.8%
Educational services 5 0.7%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 37921 vs 37912 →

ZIP 37921 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 37921 ranks the most populous - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 37921 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 37921 ranks #6 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
37912 Knoxville, TN 20,673 2.2 mi
37909 Knoxville, TN 15,168 2.4 mi
37919 Knoxville, TN 28,194 4.5 mi
37916 Knoxville, TN 12,507 4.3 mi
37902 Knoxville, TN 1,586 4.7 mi
37917 Knoxville, TN 24,072 5.2 mi
37915 Knoxville, TN 5,647 5.8 mi
37849 Powell, TN 25,459 5.9 mi
37931 Knoxville, TN 26,109 6.8 mi
37923 Knoxville, TN 27,457 5.7 mi

More ZIP Codes in Knox County

37918 standard
Knoxville, TN
Pop: 42,835
37920 standard
Knoxville, TN
Pop: 39,087
37922 standard
Knoxville, TN
Pop: 33,180
37919 standard
Knoxville, TN
Pop: 28,194
37923 standard
Knoxville, TN
Pop: 27,457
37931 standard
Knoxville, TN
Pop: 26,109

Related Areas

Knox County Knoxville, TN Tennessee

Frequently Asked Questions

What county is ZIP code 37921 in? ▼
ZIP code 37921 (Knoxville) is located in Knox County, Tennessee. Knox County contains multiple ZIP codes, see the full list at /counties/knox-tn.
What is the population of ZIP code 37921? ▼
ZIP code 37921 in Knoxville, TN has a population of 28,233 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 37921? ▼
The median household income in ZIP 37921 is $60,013, which is 21% below the national average of $76,288.
What is the average home value in ZIP 37921? ▼
The median home value in ZIP 37921 is $226,300, which is 19% below the national average of $278,155.
What is the demographic makeup of ZIP 37921? ▼
The largest racial group in ZIP 37921 is White at 64.3%. Hispanic or Latino residents make up 10.4% of the population.
How many businesses are in ZIP code 37921? ▼
ZIP code 37921 has 703 business establishments employing approximately 26,636 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 37921? ▼
The top industries by establishment count in ZIP 37921 are: Wholesale trade (100), Retail trade (94), Construction (79). There are 16 industry sectors represented in total.
How have home values changed in ZIP code 37921? ▼
According to the FHFA House Price Index, home values in ZIP 37921 increased by 7.4% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 248%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 37921? ▼
In ZIP code 37921, 56.1% of residents aged 25+ have a high school diploma or higher, and 26.3% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 37921? ▼
The mean commute time for workers in ZIP code 37921 is 20.0 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend less time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 37921? ▼
In ZIP code 37921, approximately 59.8% of occupied housing units are owner-occupied and 40.2% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 37921? ▼
The poverty rate in ZIP code 37921 is 17.2% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.