Hamilton County, Tennessee

County seat: Chattanooga · Population 390,833 (2025) · 542 sq mi

Hamilton County is the 4th most populous of Tennessee's 95 counties, with 390,833 people (2025 estimate). Its county seat is Chattanooga. It is part of the East Tennessee region, one of the 3 Grand Divisions of Tennessee. The map shows its 10 cities and towns and the 10 neighboring counties.

Map of Hamilton County, Tennessee with cities, towns and the county boundary
Hamilton County, Tennessee with its cities and towns, unincorporated communities (CDPs) and neighboring counties. Boundaries: U.S. Census Bureau, 2025. Free to use with attribution (CC BY 4.0).
Download PDF (Letter) 152 KBPNG image 125 KBTennessee county map

Hamilton County facts

County seat
Chattanooga
Population (2025 estimate)
390,833 +6.5% since 2020
Land area
542 sq mi 27th largest of 95
Water area
34 sq mi
Population density
721 per sq mi
Established
1819
Same name
One of 10 Hamilton Counties in the US
Named after
Alexander Hamilton American Founding Father and statesman (1755/1757–1804)
Largest city
Chattanooga 194,144
Median household income
$76,183
Cities and towns
10 plus 9 CDPs
ZIP codes
32
Time zone
Eastern
FIPS code
47065

Cities and towns in Hamilton County

Hamilton County has 10 incorporated cities, towns and villages. Populations count the people living inside Hamilton County; cities that cross a county line also list the other counties.

NameTypePopulation 2025Also in
Chattanooga (county seat)City194,144
East RidgeCity21,921
Soddy-DaisyCity13,474
Red BankCity12,405
CollegedaleCity11,499
Signal MountainTown8,824
Lookout MountainTown2,044
LakesiteCity1,980
WaldenTown1,965
RidgesideCity441

Unincorporated communities (CDPs)

Census-designated places are communities without their own city government; the county provides their services.

CommunityPopulationAlso in
Middle Valley12,187
Harrison8,011
Apison4,271
Sale Creek2,955
Falling Water2,315
Fairmount2,110
Mowbray Mountain1,721
Flat Top Mountain1,004
Ooltewah578

ZIP codes in Hamilton County

32 ZIP codes reach into Hamilton County. ZIP codes ignore county lines, so some also cover a neighboring county.

Population of Hamilton County, 2020–2025

Hamilton County grew by 23,993 people (+6.5%) between April 2020 and July 2025: 1,101 more births than deaths and a net gain of 22,359 people from migration.

Year (July 1)Population
2020367,886
2021369,725
2022375,738
2023381,087
2024387,268
2025390,833

Neighboring counties

Printable Hamilton County map

The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.

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Sources

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