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 High-density area
- $60,013
- Median income Below-median income area
- $226,300
- Median home value Near-median home value
- 26.3%
- Bachelor's or higher Near-average bachelor's attainment
National ZIP placement
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.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 37921 (Knoxville, TN) rose +7.4% from 2023 to 2024. The all-transactions index moved from 324.0 in 2023 to 348.0 in 2024 (2000 = 100).
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 average Tennessee ZIP), while per-capita income is $30,928. The poverty rate is 17.2%, with unemployment at 3.9%; those measures add context to the income figure. Median home value is $226,300 (9% below the average Tennessee ZIP) and median rent is $1,233; 59.8% of occupied 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. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Knox County, so 37921 can be compared with both its immediate and county-level context.
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.
- Wholesale trade
Wholesale trade
100 establishments
- Retail trade
Retail trade
94 establishments
- Construction
Construction
79 establishments
- Manufacturing
Manufacturing
60 establishments
- Other services (except public administration)
Other services (except public administration)
55 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, 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
Who lives in ZIP 37921?
34.6
Median Age
47.4%
Male
52.6%
Female
7.0%
Foreign-Born
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 ZIP avg
$30,928
Per Capita Income
17.2%
Poverty Rate
3.9%
Unemployment Rate
20.0 min
Mean Commute Time
How ZIP 37921 ranks among Tennessee ZIPs
Knoxville, TN household income vs. every Tennessee ZIP code
Median household income among 593 reporting Tennessee ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$60,013 46th percentile higher than 46% of 593 Tennessee ZIPs
Each bar is a $20K-wide band; taller bars hold more Tennessee 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?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
12,957housing units
12,957
Total Housing Units
11,634
Occupied Units
1,323
Vacant Units
2.46
Avg Household Size
Occupancy Type
$226,300
Median Home Value
-9% vs state ZIP avg
$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.
- 37921
Knoxville (37921)
28,233 residents
- 37919
Knoxville (37919)
28,194 residents
- 37923
Knoxville (37923)
27,457 residents
- 37931
Knoxville (37931)
26,109 residents
- 37849
Powell (37849)
25,459 residents
- 37917
Knoxville (37917)
24,072 residents
- 37912
Knoxville (37912)
20,673 residents
- 37909
Knoxville (37909)
15,168 residents
- 37916
Knoxville (37916)
12,507 residents
What this shows Among its immediate neighbors, ZIP 37921 ranks the most populous - useful context the national average alone can't give.
ZIP 37921 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 37931
Knoxville (37931)
$92,150 median income
- 37849
Powell (37849)
$84,275 median income
- 37923
Knoxville (37923)
$73,699 median income
- 37919
Knoxville (37919)
$72,645 median income
- 37909
Knoxville (37909)
$66,984 median income
- 37921
Knoxville (37921)
$60,013 median income
- 37917
Knoxville (37917)
$54,423 median income
- 37902
Knoxville (37902)
$50,161 median income
- 37912
Knoxville (37912)
$47,416 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.
| 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 |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 37921, both outside TN so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (28,233 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Knox County
Related Areas
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.
Related
Take this with you
What to do with ZIP 37921's numbers, next.
- See how ZIP 37921 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Knoxville, TN ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.