Total Population in Fairfax County, VA
ACS 2024 5-Year Estimates
How Fairfax County Compares
National Distribution
Where Fairfax County falls among all 3,222 U.S. counties for total population.
■ Fairfax County: 1,147,837
Ranking Context
| Rank | County | Value |
|---|---|---|
| #39 | Contra Costa County, CA | 1,165,012 |
| #40 | Collin County, TX | 1,163,337 |
| #41 | Mecklenburg County, NC | 1,154,681 |
| #42 | Fairfax County, VA | 1,147,837 |
| #43 | Fulton County, GA | 1,076,561 |
| #44 | Montgomery County, MD | 1,065,949 |
| #45 | Pima County, AZ | 1,060,490 |
Total Population in Fairfax County, Virginia
Fairfax County, Virginia has a total population of 1,147,837, which ranks #42 of 3,222 out of 3,222 counties nationwide. This is 99.7% below the national value of 330M.
Within Virginia, Fairfax County ranks #1 of 133 out of 133 counties. This places it in the 99th percentile nationally.
Total population count from the American Community Survey. All data comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates for 2024.
About this data
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2024). All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.