FAIRFAX COUNTY DATA

Fairfax County produces annual small-area and county-level estimates and forecasts. Point-in-time data as of January 1.

Most reliable when I need:

• Estimates and Forecasts for Fairfax County or a sub-area of the county.
  • Overall Population
  • Housing Units by Type of Value
  • Overall Number of Households
• Owned Housing Market Value
• Rental Housing Inventory, Costs and Vacancy Rates
• Existing Land Use
• Commercial and Industrial Gross Floor Area by Type

Data sources:

DECENNIAL CENSUS DATA

Most reliable when I need:

• Population estimates for a decennial census year
• Persons by race or ethnicity estimates for a decennial census year
• Persons by age and/or sex for a decennial census year

Data sources:

American Community Survey (ACS)

Ongoing survey conducted by the U.S. Census Bureau providing small-area and county-level estimates. Flow estimates over a period of time - one-year and five-year periods. Avoid mixing one and five year data. One-year ACS data are more current but do not provide large enough sample sizes to generate small area estimates. Use one-year data when county-level information is desired. Use five-year data when sub-county information is desired.

Most reliable data when I need:

• Population Characteristics
  • Educational Attainment
  • Occupation
  • Health Insurance Coverage
  • Poverty Status
• Household Characteristics
  • Household and Family Income
  • Language Spoken
• Community or Census Designated Place population or household characteristics information

Data sources:

Survey Research Tools

American Community Survey (ACS) Tools