ZIP codes

ZIP codes in Blount County, Tennessee

Blount County has 12 ZIP codes. 7 lie entirely inside it and 5 are shared with neighboring counties, so part of their land and their people are elsewhere. About 138,744 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 12; 1 more just touches the border (under 1% of their land)
Entirely inside: 7; 99% or more of their land
Shared with other counties: 5; Most with Loudon County (2)
Most populated ZIP: 37803; 33,822 people · Maryville
Least populated ZIP: 37878; 761 people
Largest ZIP by land: 37882; 184 sq mi · Townsend

Map of the ZIP codes in Blount 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 Blount County

12 ZIP codes in Blount County, TN, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
37701	Alcoa	10,247	100%	10,247
37737	Friendsville	7,081	94%	≈ 6,887
37742	Greenback	7,046	32%	≈ 3,833
37777	Louisville	12,877	100%	12,877
37801	Maryville	28,090	88%	≈ 27,804
37803	Maryville	33,822	100%	33,822
37804	Maryville	27,382	100%	27,382
37853	Rockford	3,365	91%	≈ 3,123
37865	Seymour	25,074	31%	≈ 5,297
37878	—	761	100%	761
37882	Townsend	2,914	100%	2,914
37886	Walland	3,670	100%	3,670

They also touch the county with under 1% of their land, so they aren’t counted: 37920.

ZIP codes shared with other counties

These 5 ZIP codes have part of their land in another county. The first figure is the share of their land in Blount County; then, where the rest lies.

37737 (Friendsville): 94% here; 6.2% in Loudon County.
37742 (Greenback): 32% here; 68% in Loudon County.
37801 (Maryville): 88% here; 12% in Monroe County.
37853 (Rockford): 91% here; 8.9% in Knox County.
37865 (Seymour): 31% here; 69% in Sevier 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 Maryville (3), Alcoa (1), Friendsville (1), Greenback (1), Louisville (1), and Rockford (1); 9 places in all.

They start with 2 different three-digit prefixes, one per USPS sorting center: 377 and 378.

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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