Total Population in Fairfax County, VA
ACS 2024 5-Year Estimates
1,147,837
Rank #42/3,222 · #1 in VA
99th
Fairfax 1,147,837
VA 8,705,170 -86.8%
US 330M
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How Fairfax County's total population of 1,147,837 compares to all 3,222 U.S. counties. Values range from 33 to 9,808,667.
Distribution of Total Population Across All Counties
Ranking Context
Counties ranked closest to Fairfax County for total population.
Nearby Rankings
Full ranking →| #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 |
About Total Population
Fairfax County, Virginia has a total population of 1,147,837, ranking #42 of 3,222 counties nationwide — 99.7% below the national value of 330M. Within Virginia, it ranks #1 of 133. This places it in the 99th percentile nationally.
Total population count from the American Community Survey. Source: U.S. Census Bureau, American Community Survey 2024 5-Year Estimates. All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.