37721 ZIP Code — Corryton, TN

Knox County, Tennessee

ZIP code 37721 is located in Corryton, Tennessee, within Knox County. It covers approximately 49.28 square miles and serves a population of 14,522 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 865.

About ZIP code 37721

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1990s, giving the area an established character. Median home value is $195,700. Owner-occupancy is high at 84%, well above the national average.

Median household income is $60,422. 38% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 30 minutes is near the national average.

College attainment at 18% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of smoking (24%) compared to national benchmarks.

Overall, ZIP code 37721 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

14,522

population

49.28

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

37721 ZIP code map

Cities in ZIP code 37721

Below are the cities the US Postal Service accepts for ZIP code 37721. Using any city not on this list may result in mail delivery delays.

City	Status
Corryton	Preferred

Nearby ZIP codes

37806 Mascot (5.3 mi) 37779 Luttrell (5.6 mi) 37924 Knoxville (6 mi) 37938 Knoxville (6.5 mi) 37918 Knoxville (7.5 mi) 37871 Strawberry Plains (8.3 mi) 37709 Blaine (8.9 mi) 37807 Maynardville (9.3 mi) 37914 Knoxville (10.2 mi) 37917 Knoxville (10.5 mi) 37754 Heiskell (11.9 mi) 37915 Knoxville (12 mi)

Demographics updated 05/2026

Population
Total population	14,522
Population density	295 / sq mi
State FIPS	47
County FIPS	093

Geography
Land area	49.28 sq mi
Water area	0.01 sq mi
Latitude	36.1290
Longitude	-83.8119
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	44.9%	42.5%	45.7%
$50k – $100k	36.7%	31.1%	30.9%
$100k – $200k	16.1%	20.2%	18.3%
Over $200k	2.3%	6.3%	5.1%

Demographics & statistics

14,522

Population

295

People per sq mi

41.9

Median age

$60,422

Median household income

$28,296

Per capita income

$195,700

Median home value

$936

Median monthly rent

83.8%

Home ownership

9.7%

Poverty rate

3.9%

Unemployment

5,086

Housing units

17.7%

Bachelor's or higher

Age distribution

Male Female

476

Under 5

449

353

5–9

332

508

10–14

478

386

15–19

363

556

20–24

523

885

25–34

833

910

35–44

857

1,059

45–54

997

475

55–59

447

453

60–64

426

891

65–74

839

465

75–84

438

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	3,040	20.9%
18 and over	11,482	79.1%
65 and over	2,756	19.0%
Median age	41.9 years

Race & ethnicity

White 96%

Two or more races 1.7%

Hispanic or Latino 1.1%

Black or African American 0.8%

Other race 0.3%

Asian 0.1%

Group	Count	%
White	14,088	96%
Two or more races	249	1.7%
Hispanic or Latino	158	1.1%
Black or African American	115	0.8%
Other race	48	0.3%
Asian	22	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	44.9%	42.5%	45.7%
$50k – $100k	36.7%	31.1%	30.9%
$100k – $200k	16.1%	20.2%	18.3%
Over $200k	2.3%	6.3%	5.1%

Under $10k 2.5%

$10k–$15k 3.4%

$15k–$25k 7.5%

$25k–$35k 11.5%

$35k–$50k 15.3%

$50k–$75k 23.1%

$75k–$100k 14.1%

$100k–$150k 13.9%

$150k–$200k 6.4%

$200k+ 2.4%

Range	% of households
Under $10k	2.5%
$10k–$15k	3.4%
$15k–$25k	7.5%
$25k–$35k	11.5%
$35k–$50k	15.3%
$50k–$75k	23.1%
$75k–$100k	14.1%
$100k–$150k	13.9%
$150k–$200k	6.4%
$200k+	2.4%
Median income	$60,422

Housing

Home values

Under $50k 6.7%

$50k–$100k 8.4%

$100k–$150k 10.3%

$150k–$200k 26.9%

$200k–$300k 35.7%

$300k–$500k 7.8%

$500k–$1M 3.8%

$1M+ 0.3%

Housing overview

Metric	Value
Median home value	$195,700
Median rent / month	$936
Owner occupied	83.8%
Renter occupied	16.2%
Vacant	6.9%
Single-family detached	78.4%
Large apartment buildings	0.0%
Mobile homes	18.1%
Median rooms	5.9
Avg household size (owned)	2.64

Year built

Era	%
2020 or later	0.0%
2010–2019	7.4%
2000–2009	23.4%
1990–1999	24.8%
1980–1989	11.8%
1970–1979	12.9%
1960–1969	5.6%
1950–1959	5.8%
1940–1949	4.4%
1939 or earlier	3.9%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	2.8%
2 bedrooms	19.1%
3 bedrooms	60.6%
4 bedrooms	15.8%
5+ bedrooms	1.7%

Vehicles per household

Vehicles	% of households
No vehicle	1.9%
1 vehicle	20.9%
2 vehicles	43.3%
3 or more	34.0%

Heating fuel

Fuel type	%
Utility gas	9.4%
Electricity	81.4%
Propane / LP gas	7.0%
Fuel oil	0.2%
Wood	1.3%
No fuel used	0.5%

Households & families

Household type	Count	%
Married-couple family	3,467	62.2%
Cohabiting couple	260	4.7%
Male householder, no spouse	736	13.2%
Female householder, no spouse	1,109	19.9%
Households with children under 18	1,758	31.6%
Households with seniors (65+)	1,883	33.8%
Average household size	2.61

Marital status

Status	Male	Female
Never married	28.7%	16.5%
Married	58.7%	61.9%
Separated	0.6%	1.7%
Widowed	2.6%	10.1%
Divorced	9.4%	9.7%

Education

Less than 9th grade 4.0%

Some HS, no diploma 8.6%

HS graduate 37.2%

Some college, no degree 24.6%

Associate's degree 7.9%

Bachelor's degree 12.4%

Graduate / professional 5.2%

Metric	%
HS diploma or higher	87.4%
Bachelor's or higher	17.7%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	293	9.2%
Kindergarten	139	4.4%
Elementary school	1,373	43.0%
High school	630	19.7%
College / grad school	758	23.7%

Employment

Industry of employment

Education & healthcare 22.2%

Retail trade 14.0%

Construction 12.0%

Professional & management 10.4%

Manufacturing 9.1%

Transportation & utilities 7.8%

Other services 7.6%

Arts, food & hospitality 5.0%

Finance & real estate 3.6%

Public administration 3.3%

Wholesale trade 3.1%

Information 1.1%

Agriculture & mining 0.8%

Occupation

Category	%
Management, business & arts	31.9%
Service	15.3%
Sales & office	25.1%
Natural resources & construction	11.6%
Production & transportation	16.1%

Employment type

Type	%
Private sector	76.7%
Government	14.5%
Self-employed	8.4%
Unpaid family workers	0.5%

Commute

Method	%
Drive alone	86.9%
Carpool	7.1%
Public transit	0.2%
Walk	0.0%
Work from home	5.7%
Other means	0.1%
Avg commute (minutes)	30.1

Poverty

All people 9.7%

Under 18 years 13.1%

18 and over 8.8%

Married-couple families 6.5%

Female-led households 18.0%

Income support

Source	% of households
Social Security	37.5%
Retirement income	25.9%
Supplemental Security	4.2%
Cash public assistance	0.7%
Food stamps / SNAP	9.5%

Health indicators

Condition	%
Obesity	35.9%
High blood pressure	37.5%
High cholesterol	35.8%
Diabetes	11.7%
Heart disease	7.0%
Stroke	3.2%
Asthma	10.8%
Arthritis	29.6%
Kidney disease	2.9%
Pulmonary disease	8.9%
Cancer	6.6%

Behavior / access	%
Smoking	23.9%
Binge drinking	15.4%
No physical activity	25.0%
Less than 7 hrs sleep	35.0%
Depression	28.4%
Fair or poor health	16.5%
Poor mental health	17.9%
Poor physical health	11.9%
No health insurance	16.2%
Visited doctor (checkup)	74.5%
Visited dentist	57.2%
Cholesterol screening	90.2%
Teeth loss	16.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,091	9.5%

Disability	%
Any disability	14.3%
Under 18	4.3%
18–64 years	12.0%
65 and over	32.7%

Health insurance coverage

Type	%
Private insurance	71.2%
Public insurance	36.1%
No insurance	6.0%
Uninsured under 19	3.2%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	13,597	93.6%
Spanish	64	0.5%
Other Indo-European	37	0.3%
Asian & Pacific Islander	27	0.2%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	14,404	99.2%
Born in same state	14,212	97.9%
Born in different state	10,834	74.6%
Foreign born	192	1.3%
Naturalized citizen	118	0.8%
Not a US citizen	92	78.0%

Ancestry

Ancestry	Count	%
Arab	2,508	17.3%
French	1,613	11.1%
Italian	1,605	11.1%
German	273	1.9%

Ancestry	Count	%
English	155	1.1%
Polish	49	0.3%
Irish	48	0.3%
Norwegian	8	0.1%

Technology access

Metric	% of households
Computer access	38.4%
Internet access	93.4%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 37721

What city is ZIP code 37721 in?

ZIP code 37721 is primarily assigned to Corryton, Tennessee.

What county is ZIP code 37721 in?

ZIP code 37721 falls within Knox County, Tennessee.

Is ZIP code 37721 mostly owner-occupied?

84% of occupied units in ZIP code 37721 are owner-occupied, well above the national average.

Does ZIP code 37721 have a large retiree population?

38% of households in ZIP code 37721 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 37721 have a large veteran population?

10% of civilians in ZIP code 37721 are veterans, above the national average of ~7%.

What is the population of ZIP code 37721?

ZIP code 37721 has an estimated population of 14,522 residents, with a density of 295 people per square mile.

What timezone is ZIP code 37721 in?

ZIP code 37721 observes the EST timezone.