37618 ZIP Code — Bluff City, TN

Sullivan County, Tennessee

ZIP code 37618 is located in Bluff City, Tennessee, within Sullivan County. It covers approximately 69.31 square miles and serves a population of 12,792 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 423.

About ZIP code 37618

The housing stock consists of a higher-than-average concentration of mobile homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $161,300. Owner-occupancy is high at 78%, well above the national average.

Median household income is $53,158. 41% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with manufacturing as the leading industry. The average commute of 27 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 (25%) compared to national benchmarks.

Overall, ZIP code 37618 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

12,792

population

69.31

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

37618 ZIP code map

Cities in ZIP code 37618

Below are the cities the US Postal Service accepts for ZIP code 37618. Using any city not on this list may result in mail delivery delays.

City	Status
Bluff City	Preferred

Nearby ZIP codes

37699 Piney Flats (6.6 mi) 37694 Watauga (7.1 mi) 37686 Piney Flats (8.2 mi) 37643 Elizabethton (8.3 mi) 37620 Bristol (8.5 mi) 24201 Bristol (10.3 mi) 37617 Blountville (10.8 mi) 37601 Johnson City (12.4 mi) 37604 Johnson City (14.5 mi) 37658 Hampton (14.9 mi) 37615 Johnson City (14.9 mi) 37640 Butler (15 mi)

Demographics updated 05/2026

Population
Total population	12,792
Population density	185 / sq mi
State FIPS	47
County FIPS	163

Geography
Land area	69.31 sq mi
Water area	0.71 sq mi
Latitude	36.4668
Longitude	-82.2017
Timezone	Eastern (ET)
Area code	423

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	50.5%	51.9%	45.7%
$50k – $100k	36.5%	29.9%	30.9%
$100k – $200k	11.1%	14.6%	18.3%
Over $200k	1.9%	3.5%	5.1%

Demographics & statistics

12,792

Population

185

People per sq mi

45.8

Median age

$53,158

Median household income

$31,118

Per capita income

$161,300

Median home value

$879

Median monthly rent

77.8%

Home ownership

15.7%

Poverty rate

7.9%

Unemployment

4,906

Housing units

17.4%

Bachelor's or higher

Age distribution

Male Female

401

Under 5

409

282

5–9

288

472

10–14

480

280

15–19

286

180

20–24

183

770

25–34

785

716

35–44

730

818

45–54

832

447

55–59

455

526

60–64

536

824

65–74

839

483

75–84

491

138

85+

141

← Male

Female →

Age summary

Group	Count	%
Under 18	2,637	20.6%
18 and over	10,155	79.4%
65 and over	2,916	22.8%
Median age	45.8 years

Race & ethnicity

White 94.4%

Two or more races 2.3%

Hispanic or Latino 1.6%

Other race 1%

Black or African American 0.6%

Asian 0.1%

Group	Count	%
White	12,278	94.4%
Two or more races	296	2.3%
Hispanic or Latino	208	1.6%
Other race	135	1%
Black or African American	72	0.6%
Asian	9	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	50.5%	51.9%	45.7%
$50k – $100k	36.5%	29.9%	30.9%
$100k – $200k	11.1%	14.6%	18.3%
Over $200k	1.9%	3.5%	5.1%

Under $10k 4.2%

$10k–$15k 4.9%

$15k–$25k 8.4%

$25k–$35k 11.2%

$35k–$50k 16.1%

$50k–$75k 22.8%

$75k–$100k 13.5%

$100k–$150k 13.8%

$150k–$200k 3.0%

$200k+ 2.1%

Range	% of households
Under $10k	4.2%
$10k–$15k	4.9%
$15k–$25k	8.4%
$25k–$35k	11.2%
$35k–$50k	16.1%
$50k–$75k	22.8%
$75k–$100k	13.5%
$100k–$150k	13.8%
$150k–$200k	3.0%
$200k+	2.1%
Median income	$53,158

Housing

Home values

Under $50k 11.5%

$50k–$100k 14.5%

$100k–$150k 19.1%

$150k–$200k 15.9%

$200k–$300k 26.3%

$300k–$500k 9.7%

$500k–$1M 2.1%

$1M+ 1.0%

Housing overview

Metric	Value
Median home value	$161,300
Median rent / month	$879
Owner occupied	77.8%
Renter occupied	22.2%
Vacant	10.5%
Single-family detached	66.4%
Large apartment buildings	1.9%
Mobile homes	24.6%
Median rooms	5.9
Avg household size (owned)	2.27

Year built

Era	%
2020 or later	0.1%
2010–2019	8.3%
2000–2009	15.4%
1990–1999	15.2%
1980–1989	14.4%
1970–1979	18.2%
1960–1969	10.4%
1950–1959	6.5%
1940–1949	4.0%
1939 or earlier	7.5%

Bedrooms

Size	% of units
No bedroom (studio)	4.5%
1 bedroom	4.5%
2 bedrooms	22.2%
3 bedrooms	54.6%
4 bedrooms	12.7%
5+ bedrooms	1.6%

Vehicles per household

Vehicles	% of households
No vehicle	3.2%
1 vehicle	26.1%
2 vehicles	39.8%
3 or more	30.8%

Heating fuel

Fuel type	%
Utility gas	5.1%
Electricity	85.0%
Propane / LP gas	3.8%
Fuel oil	1.0%
Wood	4.1%
Solar	0.3%
No fuel used	0.5%

Households & families

Household type	Count	%
Married-couple family	2,997	54.6%
Cohabiting couple	261	4.8%
Male householder, no spouse	1,034	18.9%
Female householder, no spouse	1,192	21.7%
Households with children under 18	1,563	28.5%
Households with seniors (65+)	2,045	37.3%
Average household size	2.33

Marital status

Status	Male	Female
Never married	20.9%	11.8%
Married	55.7%	60.0%
Separated	2.1%	2.1%
Widowed	4.1%	15.3%
Divorced	17.1%	10.9%

Education

Less than 9th grade 4.4%

Some HS, no diploma 7.7%

HS graduate 38.7%

Some college, no degree 21.6%

Associate's degree 10.2%

Bachelor's degree 10.7%

Graduate / professional 6.7%

Metric	%
HS diploma or higher	87.8%
Bachelor's or higher	17.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	66	2.8%
Kindergarten	148	6.3%
Elementary school	1,265	54.2%
High school	405	17.4%
College / grad school	450	19.3%

Employment

Industry of employment

Manufacturing 17.5%

Education & healthcare 16.9%

Retail trade 15.4%

Professional & management 9.6%

Construction 8.3%

Finance & real estate 6.8%

Other services 6.6%

Public administration 6.0%

Arts, food & hospitality 5.4%

Transportation & utilities 3.3%

Wholesale trade 2.4%

Information 1.1%

Agriculture & mining 0.8%

Occupation

Category	%
Management, business & arts	29.1%
Service	14.9%
Sales & office	26.3%
Natural resources & construction	8.2%
Production & transportation	21.5%

Employment type

Type	%
Private sector	77.9%
Government	14.6%
Self-employed	7.4%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	81.5%
Carpool	8.5%
Public transit	0.0%
Walk	1.9%
Work from home	7.0%
Other means	1.1%
Avg commute (minutes)	27.0

Poverty

All people 15.7%

Under 18 years 30.8%

18 and over 11.9%

Married-couple families 5.3%

Female-led households 41.6%

Income support

Source	% of households
Social Security	41.2%
Retirement income	27.6%
Supplemental Security	6.1%
Cash public assistance	1.8%
Food stamps / SNAP	13.4%

Health indicators

Condition	%
Obesity	35.1%
High blood pressure	40.4%
High cholesterol	40.8%
Diabetes	13.2%
Heart disease	8.0%
Stroke	3.7%
Asthma	11.1%
Arthritis	33.0%
Kidney disease	3.3%
Pulmonary disease	10.1%
Cancer	7.5%

Behavior / access	%
Smoking	24.6%
Binge drinking	13.7%
No physical activity	26.4%
Less than 7 hrs sleep	37.5%
Depression	27.3%
Fair or poor health	18.2%
Poor mental health	17.3%
Poor physical health	12.9%
No health insurance	16.7%
Visited doctor (checkup)	75.7%
Visited dentist	54.4%
Cholesterol screening	90.2%
Teeth loss	20.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	978	9.6%

Disability	%
Any disability	18.8%
Under 18	7.5%
18–64 years	15.8%
65 and over	36.6%

Health insurance coverage

Type	%
Private insurance	52.6%
Public insurance	50.8%
No insurance	10.3%
Uninsured under 19	2.5%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	11,982	93.7%
Spanish	46	0.4%
Other Indo-European	46	0.4%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	12,603	98.5%
Born in same state	12,562	98.2%
Born in different state	7,682	60.1%
Foreign born	41	0.3%
Naturalized citizen	189	1.5%
Not a US citizen	36	19.0%

Ancestry

Ancestry	Count	%
French	2,570	20.1%
Arab	2,395	18.7%
Italian	1,057	8.3%

Ancestry	Count	%
English	142	1.1%
Polish	38	0.3%
German	27	0.2%

Technology access

Metric	% of households
Computer access	42.9%
Internet access	87.1%

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

Frequently asked questions about ZIP code 37618

What city is ZIP code 37618 in?

ZIP code 37618 is primarily assigned to Bluff City, Tennessee.

What county is ZIP code 37618 in?

ZIP code 37618 falls within Sullivan County, Tennessee.

What is the poverty rate in ZIP code 37618?

16% of residents in ZIP code 37618 live below the poverty line, above the national average.

Does ZIP code 37618 have a large retiree population?

41% of households in ZIP code 37618 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 37618 have a large veteran population?

10% of civilians in ZIP code 37618 are veterans, above the national average of ~7%.

What is the typical home value in ZIP code 37618?

The median home value in ZIP code 37618 is $161,300.

What timezone is ZIP code 37618 in?

ZIP code 37618 observes the EST timezone.