37742 ZIP Code — Greenback, TN

Loudon County, Tennessee

ZIP code 37742 is located in Greenback, Tennessee, within Loudon County. It covers approximately 49.41 square miles and serves a population of 6,600 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 865.

About ZIP code 37742

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $239,500. Owner-occupancy is high at 92%, well above the national average.

Median household income is $83,799. 33% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is sales and office, with education and healthcare as the leading industry. The average commute of 32 minutes is near the national average.

College attainment at 17% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of smoking (22%) compared to national benchmarks.

Overall, ZIP code 37742 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

6,600

population

49.41

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

37742 ZIP code map

Cities in ZIP code 37742

Below are the cities the US Postal Service accepts for ZIP code 37742. Using any city not on this list may result in mail delivery delays.

City	Status
Greenback	Preferred

Nearby ZIP codes

37801 Maryville (4.9 mi) 37737 Friendsville (6.7 mi) 37772 Lenoir City (7.9 mi) 37803 Maryville (11 mi) 37885 Vonore (11.4 mi) 37774 Loudon (11.7 mi) 37777 Louisville (12.6 mi) 37771 Lenoir City (13 mi) 37922 Knoxville (13 mi) 37934 Farragut (13.3 mi) 37701 Alcoa (13.7 mi) 37354 Madisonville (15.7 mi)

Demographics updated 05/2026

Population
Total population	6,600
Population density	134 / sq mi
State FIPS	47
County FIPS	105

Geography
Land area	49.41 sq mi
Water area	2.88 sq mi
Latitude	35.6776
Longitude	-84.1771
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	32.6%	39.3%	45.7%
$50k – $100k	37.0%	34.4%	30.9%
$100k – $200k	27.8%	21.4%	18.3%
Over $200k	2.6%	4.9%	5.1%

Demographics & statistics

6,600

Population

134

People per sq mi

41.6

Median age

$83,799

Median household income

$40,407

Per capita income

$239,500

Median home value

$868

Median monthly rent

91.5%

Home ownership

7.5%

Poverty rate

3.0%

Unemployment

2,678

Housing units

17.0%

Bachelor's or higher

Age distribution

Male Female

184

Under 5

173

264

5–9

247

10–14

204

15–19

190

154

20–24

145

539

25–34

505

360

35–44

337

494

45–54

462

285

55–59

266

210

60–64

196

476

65–74

445

115

75–84

108

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,344	20.4%
18 and over	5,256	79.6%
65 and over	1,199	18.2%
Median age	41.6 years

Race & ethnicity

White 96.6%

Two or more races 1.6%

Asian 0.6%

Hispanic or Latino 0.5%

Black or African American 0.5%

Other race 0.1%

Group	Count	%
White	6,411	96.6%
Two or more races	105	1.6%
Asian	42	0.6%
Hispanic or Latino	36	0.5%
Black or African American	33	0.5%
Other race	9	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	32.6%	39.3%	45.7%
$50k – $100k	37.0%	34.4%	30.9%
$100k – $200k	27.8%	21.4%	18.3%
Over $200k	2.6%	4.9%	5.1%

Under $10k 3.4%

$10k–$15k 1.3%

$15k–$25k 4.9%

$25k–$35k 5.1%

$35k–$50k 15.5%

$50k–$75k 11.7%

$75k–$100k 13.8%

$100k–$150k 28.5%

$150k–$200k 5.3%

$200k+ 10.5%

Range	% of households
Under $10k	3.4%
$10k–$15k	1.3%
$15k–$25k	4.9%
$25k–$35k	5.1%
$35k–$50k	15.5%
$50k–$75k	11.7%
$75k–$100k	13.8%
$100k–$150k	28.5%
$150k–$200k	5.3%
$200k+	10.5%
Median income	$83,799

Housing

Home values

Under $50k 3.8%

$50k–$100k 3.9%

$100k–$150k 10.1%

$150k–$200k 23.2%

$200k–$300k 21.4%

$300k–$500k 29.9%

$500k–$1M 6.7%

$1M+ 1.0%

Housing overview

Metric	Value
Median home value	$239,500
Median rent / month	$868
Owner occupied	91.5%
Renter occupied	8.5%
Vacant	12.6%
Single-family detached	79.1%
Large apartment buildings	0.0%
Mobile homes	20.0%
Median rooms	5.9
Avg household size (owned)	2.55

Year built

Era	%
2020 or later	1.0%
2010–2019	11.1%
2000–2009	24.3%
1990–1999	20.3%
1980–1989	9.4%
1970–1979	12.5%
1960–1969	4.4%
1950–1959	1.3%
1940–1949	5.3%
1939 or earlier	10.4%

Bedrooms

Size	% of units
No bedroom (studio)	0.1%
1 bedroom	0.5%
2 bedrooms	11.0%
3 bedrooms	70.2%
4 bedrooms	13.7%
5+ bedrooms	4.5%

Vehicles per household

Vehicles	% of households
No vehicle	0.7%
1 vehicle	18.1%
2 vehicles	43.8%
3 or more	37.4%

Heating fuel

Fuel type	%
Utility gas	6.4%
Electricity	84.4%
Propane / LP gas	5.7%
Fuel oil	0.5%
Wood	2.8%

Households & families

Household type	Count	%
Married-couple family	1,595	63.1%
Cohabiting couple	98	3.9%
Male householder, no spouse	428	16.9%
Female householder, no spouse	408	16.1%
Households with children under 18	789	31.2%
Households with seniors (65+)	797	31.5%
Average household size	2.61

Marital status

Status	Male	Female
Never married	29.5%	17.7%
Married	61.4%	63.0%
Separated	0.0%	0.9%
Widowed	1.5%	5.4%
Divorced	7.7%	13.0%

Education

Less than 9th grade 2.1%

Some HS, no diploma 5.7%

HS graduate 37.4%

Some college, no degree 27.9%

Associate's degree 10.0%

Bachelor's degree 10.3%

Graduate / professional 6.7%

Metric	%
HS diploma or higher	92.3%
Bachelor's or higher	17.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	30	2.8%
Kindergarten	80	7.4%
Elementary school	497	45.8%
High school	367	33.8%
College / grad school	112	10.3%

Employment

Industry of employment

Education & healthcare 25.3%

Manufacturing 21.7%

Retail trade 18.1%

Professional & management 8.5%

Arts, food & hospitality 6.7%

Construction 5.2%

Transportation & utilities 4.7%

Public administration 2.8%

Finance & real estate 2.7%

Wholesale trade 1.8%

Other services 1.1%

Information 0.9%

Agriculture & mining 0.5%

Occupation

Category	%
Management, business & arts	25.6%
Service	13.8%
Sales & office	31.4%
Natural resources & construction	9.0%
Production & transportation	20.1%

Employment type

Type	%
Private sector	90.5%
Government	6.2%
Self-employed	3.0%
Unpaid family workers	0.2%

Commute

Method	%
Drive alone	88.5%
Carpool	5.4%
Public transit	0.0%
Walk	0.0%
Work from home	5.6%
Other means	0.5%
Avg commute (minutes)	31.7

Poverty

All people 7.5%

Under 18 years 19.3%

18 and over 4.5%

Married-couple families 0.4%

Female-led households 48.2%

Income support

Source	% of households
Social Security	33.1%
Retirement income	23.4%
Supplemental Security	5.3%
Cash public assistance	2.1%
Food stamps / SNAP	3.7%

Health indicators

Condition	%
Obesity	36.1%
High blood pressure	38.5%
High cholesterol	38.4%
Diabetes	11.3%
Heart disease	7.0%
Stroke	3.1%
Asthma	10.1%
Arthritis	30.4%
Kidney disease	2.8%
Pulmonary disease	8.4%
Cancer	7.2%

Behavior / access	%
Smoking	21.8%
Binge drinking	14.2%
No physical activity	23.3%
Less than 7 hrs sleep	32.7%
Depression	26.2%
Fair or poor health	14.9%
Poor mental health	16.0%
Poor physical health	11.1%
No health insurance	14.6%
Visited doctor (checkup)	75.2%
Visited dentist	61.6%
Cholesterol screening	91.6%
Teeth loss	14.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	434	8.3%

Disability	%
Any disability	13.2%
Under 18	2.7%
18–64 years	10.6%
65 and over	34.0%

Health insurance coverage

Type	%
Private insurance	80.8%
Public insurance	29.9%
No insurance	6.7%
Uninsured under 19	2.8%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	6,243	94.6%
Spanish	24	0.4%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	24	0.4%

Place of birth & citizenship

Origin	Count	%
Native born (US)	6,515	98.7%
Born in same state	6,502	98.5%
Born in different state	4,189	63.5%
Foreign born	13	0.2%
Naturalized citizen	85	1.3%
Not a US citizen	77	90.6%

Ancestry

Ancestry	Count	%
Italian	503	7.6%
French	495	7.5%
Arab	478	7.2%
Polish	88	1.3%

Ancestry	Count	%
English	59	0.9%
German	26	0.4%
Dutch	21	0.3%

Technology access

Metric	% of households
Computer access	38.3%
Internet access	97.0%

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

Frequently asked questions about ZIP code 37742

What city is ZIP code 37742 in?

ZIP code 37742 is primarily assigned to Greenback, Tennessee.

What county is ZIP code 37742 in?

ZIP code 37742 falls within Loudon County, Tennessee.

Is ZIP code 37742 mostly owner-occupied?

92% of occupied units in ZIP code 37742 are owner-occupied, well above the national average.

What is the population of ZIP code 37742?

ZIP code 37742 has an estimated population of 6,600 residents, with a density of 134 people per square mile.

What is the median household income in ZIP code 37742?

The median household income in ZIP code 37742 is $83,799, above the national median of ~$75,000.

What is the typical home value in ZIP code 37742?

The median home value in ZIP code 37742 is $239,500.

What timezone is ZIP code 37742 in?

ZIP code 37742 observes the EST timezone.