ZIP codes

ZIP codes in Sullivan County, Tennessee

Sullivan County has 10 ZIP codes. 6 lie entirely inside it and 4 are shared with neighboring counties, so part of their land and their people are elsewhere. About 161,827 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 10; 2 more just touch the border (under 1% of their land)
Entirely inside: 6; 99% or more of their land
Shared with other counties: 4; Most with Washington County (3)
Most populated ZIP: 37660; 40,996 people · Kingsport
Least populated ZIP: 37665; 4,741 people · Kingsport
Largest ZIP by land: 37620; 128 sq mi · Bristol

Map of the ZIP codes in Sullivan County

Entirely in the county (99% or more of its land)
Shared, mostly in this county
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Sullivan County

10 ZIP codes in Sullivan County, TN, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
37617	Blountville	14,744	100%	14,744
37618	Bristol	12,548	100%	12,548
37620	Bristol	38,494	100%	38,494
37656	Fall Branch	3,849	8.3%	≈ 707
37660	Kingsport	40,996	91%	≈ 38,207
37663	Kingsport	14,230	95%	≈ 13,724
37664	Kingsport	28,267	100%	28,267
37665	Kingsport	4,741	100%	4,741
37686	Johnson City	9,495	99.6%	≈ 9,463
37694	Watauga	1,729	18%	≈ 280

They also touch the county with under 1% of their land, so they aren’t counted: 37659 and 37857.

ZIP codes shared with other counties

These 4 ZIP codes have part of their land in another county. The first figure is the share of their land in Sullivan County; then, where the rest lies.

37656 (Fall Branch): 8.3% here; 63% in Washington County and 29% in Greene County.
37660 (Kingsport): 91% here; 9.1% in Hawkins County.
37663 (Kingsport): 95% here; 4.9% in Washington County.
37694 (Watauga): 18% here; 79% in Carter County and 2.6% in Washington County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Kingsport (4), Bristol (2), Blountville (1), Fall Branch (1), Johnson City (1), and Watauga (1).

All 10 start with the same three digits, 376: the prefix of the USPS sorting center that handles them.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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