Clay County, Florida

County seat: Green Cove Springs · Population 239,593 (2025) · 605 sq mi

Clay County is the 25th most populous of Florida's 67 counties, with 239,593 people (2025 estimate). Its county seat is Green Cove Springs. It is part of the Northeast Florida region, one of the 10 Florida regional planning council regions. The map shows its 4 cities and towns and the 5 neighboring counties.

Map of Clay County, Florida with cities, towns and the county boundary
Clay County, Florida 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).

Clay County facts

County seat
Green Cove Springs
Population (2025 estimate)
239,593 +9.8% since 2020
Land area
605 sq mi 43rd largest of 67
Water area
39 sq mi
Population density
396 per sq mi
Established
1858
Named after
Henry Clay American politician from Kentucky (1777-1852)
Largest city
Lakeside 32,105
Median household income
$87,820
Cities and towns
4 plus 6 CDPs
ZIP codes
12
Time zone
Eastern
FIPS code
12019

Cities and towns in Clay County

Clay County has 4 incorporated cities, towns and villages. Populations count the people living inside Clay County; cities that cross a county line also list the other counties.

NameTypePopulation 2025Also in
Green Cove Springs (county seat)City10,079
Orange ParkTown8,953
Keystone HeightsCity1,579
Penney FarmsTown835

Unincorporated communities (CDPs)

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

CommunityPopulationAlso in
Lakeside32,105
Oakleaf Plantation32,070
Fleming Island29,766
Bellair-Meadowbrook Terrace14,755
Asbury Lake14,458
Middleburg11,644

ZIP codes in Clay County

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

Population of Clay County, 2020–2025

Clay County grew by 21,344 people (+9.8%) between April 2020 and July 2025: 492 more deaths than births and a net gain of 21,721 people from migration.

Year (July 1)Population
2020218,949
2021222,715
2022226,986
2023233,262
2024237,278
2025239,593

Neighboring counties

Printable Clay County map

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Sources

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