Overview
7,951
Total Population
45.6
Median age
50.80%
Female population %
96.9:100
Gender ratio (M:F)
50-54 years
Largest age group
65.5
Total dependency ratio
White
Largest racial group
72
Hispanic population
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Port Jefferson's population is old compared to the rest of the country:
- The median age in Port Jefferson is 45.6, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
- Port Jefferson's population under 18 was 18.35%, compared to the 22.51% nationwide.
- Port Jefferson's elderly or the senior population (over 65 age) was 23.67% as compared to 16.04% nationwide.
- Of the total population in Port Jefferson, 15.90% were under the age of 15, 17.71% aged 15 to 29, 42.72% aged 30 to 64, 19.86% aged 65 to 84, and 3.81% were 85 years of age and older.

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Gender
There are 127 more females than males in Port Jefferson:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 50.80% females and 49.20% males in Port Jefferson, NY.
- The Port Jefferson, NY gender ratio is 96.9:100 i.e. 96.9 men to 100 women (0.969).
- For male population, the largest age group is 50-54 years with a population of 362.
- For the female population, the largest age group is 70-74 years with a population of 386.

Read more about Port Jefferson, NY population by gender ➔
Race / Ethnicity
Port Jefferson's population has become increasingly diverse:
- Racial distribution of Port Jefferson population: 85.17% are White, 0.96% are Black or African American, 6.94% are Asian, 2.89% are some other race and 4.04% are multiracial.
- Port Jefferson's racial breakdown clearly shows that there is an absolute majority of White population in the village.
- By ethnicity, 72 is Hispanic or Latino (of any race), and 7,231 (90.94% of the total population) is Non-Hispanic.
- The largest racial group in Port Jefferson is White with a population of 6,772 (85.17% of the total population).

Read more about Port Jefferson, NY population by race ➔
Year by year
Port Jefferson's population has already reached its peak and is showing a trend of decline:
- The peak population was 8,177 in the year 2018
- From 2000 to 2010, Port Jefferson's population decreased by 335 (4.14%), as compared to the national growth of 9.63%.
- From 2010 to 2020, Port Jefferson's population increased by 206 (2.66%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
- Between the year 2000 and 2022, Port Jefferson's population was lowest in year 2011 at 7,752.

Read more about Port Jefferson, NY population by year ➔
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates
- U.S. Census Bureau Population Estimates Population Estimates Program (PEP)