Fairfax Population

1880–2026

27,238

2026 projection

12.7% since 2020 (increase)

05K10K15K20K25K30K18801900192019401960198020002020

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Fairfax. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202627,238+4661.74%
202526,772+7342.82%
202426,038+9683.86%
202325,070+4131.67%
202224,657+2941.21%
202124,363+1890.78%
202024,174+8803.78%
201923,294+380.16%
201823,256-180.08%
201723,274-310.13%

Showing 10 of 30 years.

Fairfax Demographics

36.6median age

Median age

Female37.9 yrs
Male35.1 yrs

Adults

18,816
3,518 seniors · 19%15,298 other adults

Sex

Female 50.8% · 12,709Male 49.2% · 12,317

Population by age

MaleFemale85+ years, male: 8285+ years, female: 36980–84 years, male: 16380–84 years, female: 20575–79 years, male: 22775–79 years, female: 41870–74 years, male: 35870–74 years, female: 51765–69 years, male: 65765–69 years, female: 52260–64 years, male: 80960–64 years, female: 68455–59 years, male: 77655–59 years, female: 87250–54 years, male: 77550–54 years, female: 82445–49 years, male: 75045–49 years, female: 76240–44 years, male: 77340–44 years, female: 84535–39 years, male: 81835–39 years, female: 88130–34 years, male: 92830–34 years, female: 79025–29 years, male: 75925–29 years, female: 76920–24 years, male: 95320–24 years, female: 95815–19 years, male: 68315–19 years, female: 76610–14 years, male: 1,03610–14 years, female: 7385–9 years, male: 6565–9 years, female: 7160–4 years, male: 1,1140–4 years, female: 1,07385+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 250 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Fairfax Income

$132,348median household income

Median household income

$132,348

Half of households earn more, half earn less

Median earnings

$75,015

Typical yearly pay for a worker 25 or older.

Poverty rate

9.1%

About 1 in 11 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Fairfax Marital Status

53% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married53%56%49%
Never married34%37%32%
Divorced8%5%10%
Widowed5%1%8%
Separated<1%<1%<1%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

10 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year