• county
  • FIPS 12089
  • Largest town: Fernandina Beach

Nassau County, Florida

Nassau County had 104,376 residents in the Census Vintage 2024 estimate, on 648.7 square miles of land. It ranks 37th of 67 in Florida by population and 39th by land area.

Population
104,376
#37 of 67 in Florida · #600 in US
Area
648.7 sq mi
#39 of 67 in Florida · #1,453 in US
Density
161 / sq mi
#36 of 67 in Florida · #662 in US
Median household income
$92,766
#2 of 67 in Florida · #207 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Nassau County within Florida. Pin: Tallahassee.

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Nassau County population, land area and income

Nassau County had 104,376 residents in the Census Vintage 2024 estimate, on 648.7 square miles of land. It ranks 37th of 67 in Florida by population and 39th by land area. That works out to 160.9 people per square mile, 1.7 times the US average of 96.3, and in the top quarter nationally.

The median county-equivalent in Florida has 154,693 residents; Nassau County is somewhat smaller.

Its SAIPE 2023 median household income of $92,766 is in the top tenth among 3,143 counties with an estimate.

National rank among 3,144

Population

104,376

3144th1st

600th of 3,144 (US)

Land area

649 sq mi

3144th1st

1453rd of 3,144 (US)

Density

160.9 / sq mi

3144th1st

662nd of 3,144 (US)

Median household income

$92,766

3143rd1st

207th of 3,143 (US)

Rank within Florida (67)

Population

104,376

67th1st

37th of 67 (FL)

Land area

649 sq mi

67th1st

39th of 67 (FL)

Density

160.9 / sq mi

67th1st

36th of 67 (FL)

Median household income

$92,766

67th1st

2nd of 67 (FL)

How Nassau County's population changed since 2020

Nassau County gained 13,340 residents between the July 2020 and July 2024 estimates, a rise of 14.7%. That ranks 11th of 67 in Florida for growth. The median Florida county changed by +7.8%, and the state as a whole by +8.2%.

Since the April 2020 estimates base, Nassau County recorded 3,507 births and 4,898 deaths, a natural change of -1,391. Net international migration added +269 and net domestic migration, people moving to or from other US counties, came to +15,120. The largest single component was domestic migration, which added 15,120 people.

91.0k202094.4k202197.9k2022101.6k2023104.4k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
3,507
Deaths
4,898
Net international migration
+269
Net domestic migration
+15,120
Change, July 2023 to July 2024
+2,797

Where Nassau County is

The Census internal point of Nassau County is at 30.606000, -81.765100. It sits in UTM zone 17N. The map shades Florida's 67 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Nassau County outlined. Dots are towns of 1,000+ people with residents in it.

Escambia County: +2.7%Okaloosa County: +4.0%St. Lucie County: +17.9%Okeechobee County: +6.8%DeSoto County: +7.8%Bradford County: -0.5%Bay County: +14.4%Holmes County: +1.6%Gilchrist County: +13.1%Manatee County: +14.1%Hardee County: +2.9%Lafayette County: +5.0%Flagler County: +17.9%Nassau County: +14.7%Pasco County: +16.4%Martin County: +4.4%Palm Beach County: +5.9%Alachua County: +4.3%Lee County: +12.5%Brevard County: +8.2%Polk County: +16.8%Pinellas County: +0.6%Highlands County: +8.3%Hamilton County: +4.4%Wakulla County: +9.5%Clay County: +8.1%Suwannee County: +9.2%Madison County: +2.9%Columbia County: +6.0%Jackson County: +6.1%Calhoun County: -3.1%Franklin County: +4.0%Gulf County: +11.3%Hernando County: +11.5%Washington County: +4.7%Levy County: +10.9%Liberty County: +1.9%Putnam County: +5.3%Volusia County: +8.5%Walton County: +18.2%Osceola County: +19.7%Leon County: +2.2%Union County: +2.0%Sarasota County: +9.2%Dixie County: +5.6%Charlotte County: +12.8%Indian River County: +7.3%Broward County: +4.8%Hendry County: +16.1%Sumter County: +18.7%Miami-Dade County: +5.3%Citrus County: +10.1%Seminole County: +4.9%Lake County: +15.0%Marion County: +13.6%St. Johns County: +20.9%Gadsden County: +1.7%Jefferson County: +10.5%Baker County: +4.3%Glades County: +8.7%Collier County: +10.3%Duval County: +5.7%Taylor County: +0.4%Monroe County: -2.3%Hillsborough County: +7.8%Santa Rosa County: +9.9%Orange County: +7.1%
Change 2020 to 2024
  1. < +4.0%
  2. < +5.7%
  3. < +8.7%
  4. < +13.1%
  5. ≥ +13.1%
no data

Orange pin: Nassau County internal point. Dark pin: Tallahassee.

Internal point

Decimal
30.606000, -81.765100
DMS
30°36'21.60"N 81°45'54.36"W
UTM
17N 426659.3E 3386187.5N
Geohash
djmy57skz
Plus code
862WJ64M+CX

Towns in Nassau County

3 incorporated places of 1,000+ people have residents in Nassau County, 18,534 people together, or 18% of the county. Each figure counts only the part of the town inside Nassau County; towns marked "part" extend into another county. The largest is Fernandina Beach with 13,672.

  1. 01Fernandina Beach13,672
  2. 02Hilliard3,077
  3. 03Callahan1,785
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Nassau County

The Census 2024 county adjacency file lists 4 neighbors for Nassau County, including 2 across a state line. The most populous is Duval County, FL, with 1,055,159 residents. Distances run between Census internal points in a straight line.

Distance to Tallahassee and the nearest big city

Tallahassee is 150.2 miles W of Nassau County's internal point in a straight line. The nearest place of 100,000 or more is Jacksonville, FL (population 1,009,833), 19.6 miles away. The nearest place of 10,000 or more is St. Marys, GA (population 20,119), 15.2 miles away.

Nassau County FIPS code

The FIPS code of Nassau County is 12089: state code 12 for Florida plus county code 089. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $92,766.

Questions people ask

What is the population of Nassau County, Florida?

The Census Vintage 2024 estimate for July 1, 2024 is 104,376. That is up 13,340 people (14.7%) from the July 2020 estimate of 91,036.

What is the FIPS code of Nassau County?

12089. The first two digits (12) are Florida; the last three (089) identify the county.

What is the largest town in Nassau County?

Fernandina Beach, with 13,672 residents inside Nassau County in 2024.

Which counties border Nassau County?

4 county-equivalents border it in the Census 2024 adjacency file: Duval County, FL; Camden County, GA; Baker County, FL; Charlton County, GA.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.