PlainZIP

Corryton, TN · standard

ZIP Code 37721

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

12,733
100/sq mi
$64,892
Median income
$233,300
Median home value
17.8%
Bachelor's or higher

The verdict

Corryton pairs a below-median household income with above-median home values, in a rural, homeowner-dominated area.

38th pct
household income, US ZIPs
Top 47%
home value, US ZIPs
100
people per sq mi
82%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 37721 against every reporting US ZIP.

ZIP code 37721 is a mid-sized community (a standard USPS delivery area) in Corryton, Knox County, Tennessee, home to 12,733 residents across 127.6 square miles, a density of 100 people per square mile, in the New York time zone.

ZIP 37721 reports a modest median household income of $64,892 (2% below the Tennessee average), while per-capita income is $33,223. The poverty rate stands at 7.8% and the unemployment rate at 3.9%. Median home value sits at $233,300 (6% below the state average), median rent at $973 a month, and owner-occupancy at 82.3%.

Educational attainment sits below the national norm: 17.8% of adults hold a bachelor's degree or higher, the median age is 43.3, and the average commute is 30 minutes. To put 37721 in local context, 10 ZIP codes within roughly 10 miles appear further down this page alongside 6 additional ZIPs in Knox County, for a geography-aware comparison.

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 37721

Top 5 sectors by establishment count in Corryton, TN

Which industries have the most business establishments in ZIP 37721.

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 37721, Corryton, 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

12,733

Population

127.6

Area (sq mi)

100

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 37721?

43.3

Median Age

50.8%

Male

49.2%

Female

1.3%

Foreign-Born

White 93.0%
African American 1.9%
Asian 0.6%
American Indian or Alaska Native 0.1%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 2.8%
Hispanic or Latino 1.2%

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?

$64,892

Median Household Income

-2% vs state

$33,223

Per Capita Income

7.8%

Poverty Rate

3.9%

Unemployment Rate

30.3 min

Mean Commute Time

How ZIP 37721 ranks nationally

Corryton, TN household income vs. every US ZIP code

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

$64,892 38th percentile higher than 38% 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 57.6%
Bachelor's Degree or Higher 17.8%

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

What does housing look like?

5,886

Total Housing Units

5,568

Occupied Units

318

Vacant Units

2.57

Avg Household Size

Occupancy Type

Owner 82.3%
Renter 17.7%

$233,300

Median Home Value

-6% vs state

$973

Median Rent

1993

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

-2.9%

YoY Change (2024)

278

HPI Index (2000 = 100)

+178%

Total Change Since 2000

Home values in ZIP 37721 have decreased 2.9% over the past year (2024). Since 2000, this ZIP has seen +178% cumulative appreciation.

Year Annual Change HPI Index
2020 +4.7% 175
2021 +15.3% 201
2022 +19.4% 240
2023 +19.2% 287
2024 -2.9% 278

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 108 business establishments in ZIP 37721, employing approximately 1,091 people with a combined annual payroll of $41,145,000.

108

Businesses

1,091

Employees

$41.1M

Annual Payroll

9

Industry Sectors

Industry Establishments % of Total
Construction 25 23.1%
Other services (except public administration) 23 21.3%
Retail trade 13 12.0%
Administrative and support and waste management and remediation services 13 12.0%
Accommodation and food services 12 11.1%
Health care and social assistance 7 6.5%
Professional, scientific, and technical services 4 3.7%
Transportation and warehousing 3 2.8%
Finance and insurance 3 2.8%

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 37721 vs 37924 →

ZIP 37721 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 37721 ranks #4 by population - useful context the national average alone can't give.

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

ZIP 37721 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 37721 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
37924 Knoxville, TN 11,259 6.6 mi
37806 Mascot, TN 2,868 5.5 mi
37779 Luttrell, TN 3,978 6.4 mi
37938 Knoxville, TN 17,085 7.4 mi
37807 Maynardville, TN 9,923 8.9 mi
37918 Knoxville, TN 42,835 7.5 mi
37709 Blaine, TN 3,732 8.3 mi
37871 Strawberry Plains, TN 9,134 9.1 mi
37848 Powder Springs, TN 246 10.1 mi
37917 Knoxville, TN 24,072 10.8 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
37921 standard
Knoxville, TN
Pop: 28,233
37919 standard
Knoxville, TN
Pop: 28,194
37923 standard
Knoxville, TN
Pop: 27,457

Related Areas

Knox County Corryton, TN Tennessee

Frequently Asked Questions

What county is ZIP code 37721 in? ▼
ZIP code 37721 (Corryton) 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 37721? ▼
ZIP code 37721 in Corryton, TN has a population of 12,733 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 37721? ▼
The median household income in ZIP 37721 is $64,892, which is 15% below the national average of $76,288.
What is the average home value in ZIP 37721? ▼
The median home value in ZIP 37721 is $233,300, which is 16% below the national average of $278,155.
What is the demographic makeup of ZIP 37721? ▼
The largest racial group in ZIP 37721 is White at 93.0%. Hispanic or Latino residents make up 1.2% of the population.
How many businesses are in ZIP code 37721? ▼
ZIP code 37721 has 108 business establishments employing approximately 1,091 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 37721? ▼
The top industries by establishment count in ZIP 37721 are: Construction (25), Other services (except public administration) (23), Retail trade (13). There are 9 industry sectors represented in total.
How have home values changed in ZIP code 37721? ▼
According to the FHFA House Price Index, home values in ZIP 37721 decreased by 2.9% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 178%. 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 37721? ▼
In ZIP code 37721, 57.6% of residents aged 25+ have a high school diploma or higher, and 17.8% 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 37721? ▼
The mean commute time for workers in ZIP code 37721 is 30.3 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 37721? ▼
In ZIP code 37721, approximately 82.3% of occupied housing units are owner-occupied and 17.7% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 37721? ▼
The poverty rate in ZIP code 37721 is 7.8% 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.