ZIP codes

ZIP codes in Hamilton County, Tennessee

Hamilton County has 31 ZIP codes. 22 lie entirely inside it and 9 are shared with neighboring counties, so part of their land and their people are elsewhere. About 378,002 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 31; 1 more just touches the border (under 1% of their land)
Entirely inside: 22; 99% or more of their land
Shared with other counties: 9; Most with Bradley County (3)
Most populated ZIP: 37421; 52,985 people · Chattanooga
Least populated ZIP: 37351; 281 people · Chattanooga; 1 more with nobody living there
Largest ZIP by land: 37379; 106 sq mi · Mowbray Mountain

Map of the ZIP codes in Hamilton 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 Hamilton County

31 ZIP codes in Hamilton County, TN, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
37302	Apison	5,082	100%	5,082
37308	—	3,188	63%	≈ 2,217
37311	Cleveland	30,720	2.1%	≈ 290
37315	Collegedale	1,825	100%	1,825
37336	—	4,483	35%	≈ 1,913
37338	Graysville	3,309	16%	≈ 511
37341	Harrison	15,591	100%	15,591
37343	Chattanooga	45,101	100%	45,101
37350	Lookout Mountain	2,111	100%	2,111
37351	Chattanooga	281	100%	281
37353	McDonald	5,330	13%	≈ 1,573
37363	Collegedale	42,093	100%	42,093
37373	Sale Creek	3,273	99.5%	≈ 3,254
37377	Signal Mountain	17,188	50%	≈ 15,494
37379	Mowbray Mountain	29,430	88%	≈ 28,909
37402	Chattanooga	3,953	100%	3,953
37403	Chattanooga	6,413	100%	6,413
37404	Chattanooga	14,737	100%	14,737
37405	Chattanooga	18,109	25%	≈ 16,500
37406	Chattanooga	13,364	100%	13,364
37407	Chattanooga	9,156	100%	9,156
37408	Chattanooga	3,502	100%	3,502
37409	Chattanooga	3,357	100%	3,357
37410	Chattanooga	4,129	100%	4,129
37411	Chattanooga	18,997	100%	18,997
37412	East Ridge	21,864	100%	21,864
37415	Chattanooga	24,181	100%	24,181
37416	Chattanooga	13,919	100%	13,919
37419	Chattanooga	5,980	49%	≈ 4,660
37421	Chattanooga	52,985	100%	52,985
37450	Chattanooga	0	100%	0

They also touch the county with under 1% of their land, so they aren’t counted: 30741.

ZIP codes shared with other counties

These 9 ZIP codes have part of their land in another county. The first figure is the share of their land in Hamilton County; then, where the rest lies.

37308: 63% here; 37% in Meigs County.
37311 (Cleveland): 2.1% here; 98% in Bradley County.
37336: 35% here; 35% in Meigs County and 30% in Bradley County.
37338 (Graysville): 16% here; 58% in Bledsoe County, 20% in Sequatchie County, and 5.1% in Rhea County.
37353 (McDonald): 13% here; 87% in Bradley County.
37377 (Signal Mountain): 50% here; 46% in Sequatchie County and 3.6% in Marion County.
37379 (Mowbray Mountain): 88% here; 6.5% in Sequatchie County and 5.7% in Bledsoe County.
37405 (Chattanooga): 25% here; 75% in Marion County.
37419 (Chattanooga): 49% here; 51% in Marion 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 Chattanooga (17), Collegedale (2), Apison (1), Cleveland (1), East Ridge (1), and Graysville (1); 12 places in all.

They start with 2 different three-digit prefixes, one per USPS sorting center: 373 and 374.

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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