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ZIP codes

ZIP codes in Knox County, Tennessee

Knox County has 28 ZIP codes. 18 lie entirely inside it and 10 are shared with neighboring counties, so part of their land and their people are elsewhere. About 497,160 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes
28
3 more just touch the border (under 1% of their land)
Entirely inside
18
99% or more of their land
Shared with other counties
10
Most with Anderson County (3)
Most populated ZIP
37918
45,971 people · Knoxville
Least populated ZIP
37902
2,412 people · Knoxville; 1 more with nobody living there
Largest ZIP by land
37920
72 sq mi · Knoxville

Map of the ZIP codes in Knox County

Anderson County Blount County Grainger County Jefferson County Loudon County Roane County Sevier County Union County 37709 · Blaine · 4,177 people · 1.4% in the county 37721 · Plainview · 14,306 people · 90% in the county 37754 · 4,211 people · 27% in the county 37764 · Sevierville · 12,562 people · 13% in the county 37772 · Lenoir City · 14,646 people · 0.1% in the county 37779 · Luttrell · 3,649 people · 4.0% in the county 37806 · Mascot · 3,674 people · 89% in the county 37807 · Maynardville · 11,069 people · 0.7% in the county 37830 · Oak Ridge · 33,038 people · 0.2% in the county 37849 · Powell · 29,375 people · 71% in the county 37853 · Rockford · 3,365 people · 8.9% in the county 37871 · Strawberry Plains · 9,926 people · 46% in the county 37902 · Knoxville · 2,412 people · 100% in the county 37909 · Knoxville · 16,774 people · 100% in the county 37912 · Knoxville · 21,505 people · 100% in the county 37914 · Knoxville · 21,478 people · 100% in the county 37915 · Knoxville · 5,991 people · 100% in the county 37916 · Knoxville · 15,583 people · 100% in the county 37917 · Knoxville · 24,615 people · 100% in the county 37918 · Knoxville · 45,971 people · 100% in the county 37919 · Knoxville · 31,754 people · 100% in the county 37920 · Knoxville · 44,995 people · 99.4% in the county 37921 · Knoxville · 28,717 people · 100% in the county 37922 · Knoxville · 40,394 people · 99.1% in the county 37923 · Knoxville · 30,131 people · 100% in the county 37924 · Knoxville · 14,420 people · 100% in the county 37929 · Knoxville · 0 people · 100% in the county 37931 · Karns · 31,842 people · 91% in the county 37932 · Farragut · 25,424 people · 100% in the county 37934 · Farragut · 28,272 people · 100% in the county 37938 · Halls · 17,437 people · 99.0% in the 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 Knox County

28 ZIP codes in Knox County, TN, by number
ZIP code Main city Population Land in the county Residents in the county
37709 Blaine 4,177 1.4% ≈ 115
37721 Plainview 14,306 90% ≈ 13,623
37754 — 4,211 27% ≈ 1,824
37764 Sevierville 12,562 13% ≈ 787
37779 Luttrell 3,649 4.0% ≈ 155
37806 Mascot 3,674 89% ≈ 3,473
37849 Powell 29,375 71% ≈ 24,923
37853 Rockford 3,365 8.9% ≈ 242
37871 Strawberry Plains 9,926 46% ≈ 5,085
37902 Knoxville 2,412 100% 2,412
37909 Knoxville 16,774 100% 16,774
37912 Knoxville 21,505 100% 21,505
37914 Knoxville 21,478 100% 21,478
37915 Knoxville 5,991 100% 5,991
37916 Knoxville 15,583 100% 15,583
37917 Knoxville 24,615 100% 24,615
37918 Knoxville 45,971 100% 45,971
37919 Knoxville 31,754 100% 31,754
37920 Knoxville 44,995 99.4% ≈ 44,832
37921 Knoxville 28,717 100% 28,717
37922 Knoxville 40,394 99.1% ≈ 40,332
37923 Knoxville 30,131 100% 30,131
37924 Knoxville 14,420 100% 14,420
37929 Knoxville 0 100% 0
37931 Karns 31,842 91% ≈ 30,944
37932 Farragut 25,424 100% 25,424
37934 Farragut 28,272 100% 28,272
37938 Halls 17,437 99.0% ≈ 17,394

They also touch the county with under 1% of their land, so they aren’t counted: 37772, 37807, and 37830.

ZIP codes shared with other counties

These 10 ZIP codes have part of their land in another county. The first figure is the share of their land in Knox County; then, where the rest lies.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Knoxville (15), Farragut (2), Blaine (1), Halls (1), Karns (1), and Luttrell (1); 12 places in all.

They start with 3 different three-digit prefixes, one per USPS sorting center: 377, 378, and 379.

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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