States · Virginia · Fairfax County

Sully Square, Virginia.

A community in Fairfax County, with no city government of its own. Zillow publishes no home prices for it: see Fairfax County’s.

Living in Sully Square, Fairfax County, Virginia

Sully Square, in Fairfax County, had 2,300 people in the 2020 census. Unemployment in Fairfax County was 3.3% in August 2026, and the county had 0.3% fewer jobs in 2025 than the year before. The most people in Fairfax County work in professional services, then schools and health care.

People 2,300 in the 2020 census; median age 32.6
Household income Too few homes in Sully Square for the Census survey to measure.
Unemployment 3.3% Fairfax County, August 2026; 3.4% a year before
Homes Too few homes in Sully Square for the Census survey to measure.
  • 863households
  • 81%of adults have a degree
  • 1%below the poverty line

What people in Fairfax County work in

  • Professional and business services27%
  • Schools, hospitals and social care18%
  • Government12%
  • Restaurants, hotels and entertainment7%
  • Shops (retail)7%
  • Banks, insurance and property7%

Employed residents by industry, from the Census survey. Fairfax County had 634,638 jobs in 2025, 0.3% fewer than the year before (Bureau of Labor Statistics).

Weather through the year

Average daily high and low for each month: coldest in January, 43° and 25°; warmest in July, 88° and 67° 20° 40° 60° 80° J 43° 25° F M A M J J 88° 67° A S O N D
Average daily high and low for each month: coldest in January, 43° and 25°; warmest in July, 88° and 67° 20° 40° 60° 80° J 43° 25° F M A M J J 88° 67° A S O N D

Coldest in January, with highs near 43° and lows near 25°; warmest in July, with highs near 88° and lows near 67°. About 21 inches of snow and 43 inches of rain and melted snow a year.

Average daily high and low, 1991–2020, at the Washington Dc Dulles Airport weather station, 2 miles away (NOAA).

Largest workplaces in Sully Square

  1. Dominion EnergyElectric power distribution298
  2. EE ReedCommercial building construction general contractors270
  3. FedEx 13500 EDS DRTransportation air cargo265
  4. EMCOR Government ServicesGovernment base facilities operation support services85
  5. Distributed Computing Solutions Provider, Inc - Distributed Computing Solutions ProviderSoftware installation services, computer83
  6. Sierra NevadaResearch and development in the physical engineering and life sciences except nanotechnology and75
  7. Wawa SiteConvenience store33

Staff on average in 2025, as each workplace reported it to OSHA with its injury records: 7 workplaces with 20 or more staff, 1,109 people in all. Not listed: many offices and banks, which need not report to OSHA; military bases, whose staff OPM withholds; and, in about half the states, city and county governments.

Natural hazards

  1. HurricanesRelatively moderate
  2. HailRelatively moderate
  3. Winter weatherRelatively moderate
  4. Inland floodingRelatively moderate

FEMA’s National Risk Index (December 2025) rates the risk each natural hazard poses to the people, buildings and farms in Sully Square’s census tracts, against the rest of the country; all of them together, relatively low. It is meant for planning, not a substitute for a local risk assessment or a flood map: FEMA’s index.

From the U.S. Census Bureau’s 2020 census and its American Community Survey (2020–2024 five-year estimates), and the Bureau of Labor Statistics. A survey, so each figure has a margin of error, and figures it is not sure of are left out. More on Fairfax County.