What city is 37618 in?

37618 is a Bluff City, TN mailing address. By land area, 4% lies inside Bristol and 2% lies inside Bluff City; the rest is outside any Census-defined city or community.

What is the population of 37618?

About 12,548 people (±1,002), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 12,729.

What is the median household income in 37618?

$63,851 (±$5,279), compared with $69,595 for Tennessee as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 37618?

8 USPS carrier routes with 5,671 residential and 147 business mailboxes (5,819 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 37618?

The closest, measured center to center: 37694 (6.6 mi, Watauga), 37643 (7.9 mi, Elizabethton), 37686 (7.9 mi, Johnson City), 37620 (8.9 mi, Bristol), 37617 (9.8 mi, Blountville) and 37601 (10.4 mi, Johnson City).

37618 ZIP Code, Bluff City, TN

37618 is a ZIP code in Bluff City, Tennessee in Sullivan County. It covers 69 square miles of land. The closest ZIP codes are 37694, 37643 and 37686. 12,548 people live here in 5,291 households. With about 181 people per square mile it is lightly settled, and most homes are owner-occupied (82%). Median household income is $63,851, close to the Tennessee median of $69,595; the median age is 45.1, older than most ZIP codes.

Quick facts

Mailing city: Bluff City, TN
County: Sullivan County
Land area: 69 sq mi
Population: 12,548
Median household income: $63,851
Carrier routes: 8 (5,671 homes)

Key figures

Measure	Value
Residents	12,548
Households	5,291
Median household income	$63,851
Income per person	$32,849
Median age	45.1
Homeowners	81.6%
Median home value	$188,900
Median rent	$920
Bachelor's degree or higher	18.9%
Average commute (minutes)	25.3
Households with kids under 18	28.0%
Moved in the past year	7.6%
Below the poverty line	13.9%
Broadband internet	88.9%
Speak a non-English language at home	2.2%

Household income

% of households	Value
<$10K	5.0%
$10–15K	2.9%
$15–25K	8.4%
$25–35K	8.9%
$35–50K	13.8%
$50–75K	21.2%
$75–100K	15.2%
$100–150K	15.5%
$150–200K	6.3%
$200K+	2.8%

Age

% of all residents	Value
<10	10.3%
10–19	12.0%
20–24	2.7%
25–34	12.4%
35–44	12.5%
45–54	13.0%
55–64	15.4%
65–74	13.1%
75+	8.5%

Tenure

% of housing units	Value
Owned, with mortgage	32.5%
Owned outright	39.0%
Rented	16.1%
Vacant	12.4%

Type of building

% of housing units	Value
Detached house	70.6%
Townhome	0.5%
2–4 units	2.5%
5–19 units	2.7%
20+ units	1.0%
Mobile / other	22.7%

Businesses in 37618

135 business establishments with 1,108 employees (ZIP Codes Business Patterns 2023).

Construction: 22
Other Services (except Public Administration): 22
Retail Trade: 18
Professional, Scientific, and Technical Services: 12
Accommodation and Food Services: 11
Manufacturing: 10
Administrative and Support and Waste Management and Remediation Services: 10
Wholesale Trade: 8

EDDM carrier routes

37618 has 8 USPS carrier routes with 5,671 residential and 147 business mailboxes. Open the EDDM route map.

Carrier routes in 37618

37618 has 8 USPS carrier routes (8 rural (R)) with 5,671 residential and 147 business mailboxes. Routes range from 572 homes (R009) to 876 homes (R006); the median route has 721 homes. The Census counted 5,291 households in 37618 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	0
500–749	6
750–999	2
1,000–1,499	0
1,500+	0

Best routes in 37618 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

Route R005 — USPS business mailboxes 46, 638 homes
Route R006 — USPS business mailboxes 24, 876 homes
Route R007 — USPS business mailboxes 19, 746 homes
Route R001 — USPS business mailboxes 13, 748 homes
Route R004 — USPS business mailboxes 12, 752 homes

Select these 5 routes on the route map

Every carrier route in 37618

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
R001	Rural	748	13	$51,518	—	—	—
R003	Rural	695	10	$53,900	—	—	—
R004	Rural	752	12	$82,467	—	—	—
R005	Rural	638	46	$56,873	—	—	—
R006	Rural	876	24	$51,518	—	—	—
R007	Rural	746	19	$82,467	—	—	—
R008	Rural	644	11	$56,962	—	—	—
R009	Rural	572	12	$56,962	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 37618 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

37694 — Watauga city, TN (6.6 mi)
37643 — Elizabethton city, TN (7.9 mi)
37686 — Johnson City city, TN (7.9 mi)
37620 — Bristol city, TN (8.9 mi)
37617 — Blountville CDP, TN (9.8 mi)
37601 — Johnson City city, TN (10.4 mi)
24201 — Bristol city, VA (10.6 mi)
37682 — Elizabethton city, TN (12 mi)

Areas that include 37618

Where it ranks

Mail every home in 37618

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 37618, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 37618 in?: 37618 is a Bluff City, TN mailing address. By land area, 4% lies inside Bristol and 2% lies inside Bluff City; the rest is outside any Census-defined city or community.
What county is 37618 in?: 37618 is in Sullivan County.
What is the population of 37618?: About 12,548 people (±1,002), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 12,729.
What is the median household income in 37618?: $63,851 (±$5,279), compared with $69,595 for Tennessee as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 37618?: 8 USPS carrier routes with 5,671 residential and 147 business mailboxes (5,819 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 37618?: The closest, measured center to center: 37694 (6.6 mi, Watauga), 37643 (7.9 mi, Elizabethton), 37686 (7.9 mi, Johnson City), 37620 (8.9 mi, Bristol), 37617 (9.8 mi, Blountville) and 37601 (10.4 mi, Johnson City).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.