County outline
Where Duval County is located
Area breakdown
Land accounts for 83% of Duval County’s measured area and water for 17%. Its combined area converts to 2,378.8 square kilometers or approximately 587,817 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 762.699 | 1,975.381 | 488,127.4 |
| Water | 155.765 | 403.429 | 99,689.6 |
| Total | 918.464 | 2,378.811 | 587,817 |
How Duval County compares
By original Census land area, Duval County ranks #28 of 67 in Florida and #1143 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 1.095 times the Florida county-equivalent median of 696.5 square miles. It accounts for 1.4% of the combined county land area in the state.
See the complete Florida ranking · What counts as a county equivalent?
Population and density of Duval County
The Census Bureau estimates that 1,062,963 people lived in Duval County on July 1, 2025. That ranks #47 of 3,222 county equivalents nationally and #6 of 67 in Florida. Since the April 1, 2020 estimates base of 995,569, the population has grown by 67,394 (+6.8%), compared with +8.9% for Florida as a whole.
With 762.7 square miles of land, that is 1,394 people per square mile (538 per km²), placing Duval County #129 nationally for density and #7 in Florida. The median county equivalent has 47 people per square mile; the Florida median is 209. Put another way, there are about 0.459 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 997,800 | 1,003,124 | 1,022,751 | 1,041,746 | 1,054,732 | 1,062,963 |
| Change | — | +5,324 | +19,627 | +18,995 | +12,986 | +8,231 |
U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.
Cities and towns in Duval County
5 incorporated places lie at least partly in Duval County. Together they are home to 1,062,963 people (100%); the other 0 (0%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Jacksonville city, with 1,017,689 residents in the county. Among places with at least 1,000 residents in 2020, Jacksonville city grew fastest since then (+7.2%).
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Jacksonville city | 1,017,689 | +7.2% | 747.3 |
| Jacksonville Beach city | 23,615 | −0.9% | 7.316 |
| Atlantic Beach city | 13,245 | −2% | 3.683 |
| Neptune Beach city | 7,020 | −2.6% | 2.337 |
| Baldwin town | 1,394 | −1.1% | 2.022 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Duval County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Duval County is a central county of the Jacksonville, FL Metropolitan Statistical Area. Its 5 county equivalents have 1,785,500 residents on 3,201.9 square miles of land; Duval County accounts for 23.8% of the land and 59.5% of the residents. By combined land it ranks #95 of 393 metropolitan areas, and #39 by population. It belongs to the Jacksonville-Kingsland-Palatka, FL-GA Combined Statistical Area.
| County equivalent | Population 2025 | Land mi² |
|---|---|---|
| Duval County | 1,062,963 | 762.7 |
| St. Johns County | 346,328 | 600.7 |
| Clay County | 239,593 | 604.6 |
| Nassau County | 106,879 | 648.7 |
| Baker County | 29,737 | 585.2 |
ZIP codes
38 ZIP Code Tabulation Areas have land in Duval County; 35 of them have most of their land inside the county, and the others mainly cover neighboring areas.
3208132202322033220432205322063220732208322093221032211322123221432216322173221832219322203222132222322233222432225322263222732228322333223432244322463225032254322563225732258322593226632277
ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.
Counties bordering Duval County
Duval County shares a land border with 4 county equivalents. It has more land than every one of them. The largest neighbor is Nassau County (648.7 mi²) and the smallest is Baker County (585.2 mi²). Together with its neighbors, Duval County forms a block of 3,201.9 mi² of land, of which it holds 23.8%.
| Bordering county equivalent | Land mi² | Size vs. Duval | Compare |
|---|---|---|---|
| Nassau County | 648.7 | 1.2× smaller | Compare |
| Clay County | 604.6 | 1.3× smaller | Compare |
| St. Johns County | 600.7 | 1.3× smaller | Compare |
| Baker County | 585.2 | 1.3× smaller | Compare |
How big is Duval County compared with U.S. states?
Duval County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.4 times as much. Florida’s county land could hold about 70 areas the size of Duval County.
Another way to picture it: the same land area would fill a square about 27.6 miles (44.4 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.
State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.
What stands out about Duval County?
Duval County has more land than 2,079 of the other 3,221 county equivalents in the dataset.
A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.
Does including water change its rank?
Using land plus water places Duval County at #907 nationally by total area, 236 places closer to the top than its land rank. The water assigned to this geography moves it ahead of some county equivalents with more land.
Its water share is 17%, compared with a national county-equivalent median of 1.2% — 15.8 percentage points higher. This describes the statistical geography’s land/water mix, not flood exposure or developable land.
Closest positions in the national land ranking
These entries sit immediately beside Duval County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #1142 | Independence County, Arkansas | 763.7 | Compare |
| #1143 | Duval County, Florida | 762.7 | This county |
| #1144 | Iowa County, Wisconsin | 762.7 | Compare |
Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.
Representative coordinates
The Census internal point is 30.335245, -81.648113. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.
Source and precision
U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 1,975,380,731 m²; AWATER: 403,428,451 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.
Common questions
How big is Duval County?
Duval County, Florida has 762.7 square miles (1,975.4 km²) of land and 155.8 square miles of water, for a total area of 918.5 square miles. It ranks #1143 of 3,222 U.S. county equivalents by land area.
Is Duval County the largest county in Florida?
No. Duval County ranks #28 of 67 in Florida by land area. The largest is Collier County, with 1,997 square miles of land.
What counties border Duval County?
Duval County shares a land border with Nassau County, St. Johns County, Clay County, and Baker County.
What is the population of Duval County?
The Census Bureau estimates Duval County had 1,062,963 residents on July 1, 2025, ranking #47 of 3,222 county equivalents. That is 1,394 people per square mile of land.
What cities and towns are in Duval County?
Duval County has 5 incorporated places. The most populous are Jacksonville city, Jacksonville Beach city, Atlantic Beach city, Neptune Beach city, and Baldwin town.
Is Duval County part of a metropolitan area?
Yes. It is a central county of the Jacksonville, FL Metropolitan Statistical Area, which has 5 county equivalents and 1,785,500 residents.
How many ZIP codes are in Duval County?
38 ZIP Code Tabulation Areas have land in Duval County, and 35 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Duval County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 1.4 times as much land.
How many acres of land are in Duval County?
The land measurement converts to approximately 488,127 acres. Including water, total area is approximately 587,817 acres. One square mile equals 640 acres.
Why might another source show a different area?
Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.
Can this establish a property boundary?
No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.