How many people live in Nassau County, FL?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 104,400 people living in Nassau County, FL. That makes Nassau County the 37th-most populous county in Florida. It is home to 0.44% of people living in the state.
104K
population of Nassau County, FL (2024)
0.44%
County share of the Florida population (2024)
About 104,400 people lived in Nassau County, FL in 2024.
Population estimates, 2000–2024
What are Nassau County, FL’s age demographics?
About 25,900 Nassau County, FL residents are aged 65 and older in 2024. That represents 24.9% of its population. For comparison, the age group represents 21.8% of Florida’s population and 18% in the US overall.
Another 19,700 Nassau County residents, or 18.9% of the population, were children under 18. For comparison, the age group represents 19.3% of Florida’s population and 21.6% in the US overall.
A higher share of Nassau County, FL's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Nassau County, FL’s racial and ethnic demographics?
Non-Hispanic white residents make up 83.8% of the Nassau County, FL population, higher than the national share of 57.5%.
In contrast, Nassau County’s Hispanic population accounts for 6.4%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 6.3% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Nassau County, FL has a higher share of a non-Hispanic white population than Florida as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Nassau County, FL is Fernandina Beach with about 13,700 residents in 2024.
Cities and towns in Nassau County, FL ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Fernandina Beach | 13,672 |
| 2. | Hilliard | 3,077 |
| 3. | Callahan | 1,785 |
| 4. | Balance of Nassau County | 85,842 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
