Data / Population density / Fairfax city

Population density in Fairfax city

Population density in Fairfax city was 1,656.3 inhabitants per km² in 2025, according to the U.S. Census Bureau. That is up 2.8% from 2024. That is the 8th highest of 133 counties in 2025.

2025, inhabitants per km²1,656.3
Change on 2024+2.8%
Rank8th of 133Counties in Virginia ranked
Series high1,656.32025
Series low1,495.62020

Population density in Fairfax city, 2020 to 2025

CSVChart (SVG)

1,4501,5001,5501,6001,6501,7002020202120222023202420252020: 1,495.6 inhabitants per km²2021: 1,507.2 inhabitants per km²2022: 1,525.4 inhabitants per km²2023: 1,551 inhabitants per km²2024: 1,610.9 inhabitants per km²2025: 1,656.3 inhabitants per km²
inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09, published 2026-03-26.
All 6 values
Periodinhabitants per km²
20251,656.3
20241,610.9
20231,551
20221,525.4
20211,507.2
20201,495.6

Compared with Virginia and United States

Place2025
Fairfax city1,656.3
Virginia86.8
United States37.3

Rankings

Definition

Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.

United States: Census Bureau population estimates for 1 July divided by land area (water excluded) from the latest Census Gazetteer files. US tables often give people per square mile; multiply persons per km² by 2.59 to compare.

How to cite

U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.

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Questions

What is the population density in Fairfax city?

Population density in Fairfax city was 1,656.3 inhabitants per km² in 2025, according to the U.S. Census Bureau. That is up 2.8% from 2024. That is the 8th highest of 133 counties in 2025.

Where does this figure come from?

U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². Retrieved by Invokely on 2026-10-09.

What was the highest population density in Fairfax city?

1,656.3 inhabitants per km² in 2025, the highest value since 2020 in this series.

More statistics for Fairfax city

All statistics for Fairfax city