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Demographic Estimates & Forecasts
Periodically, demographic estimates and forecasts of population, housing units, households, and employment are produced for the county and areas within the county. Note: Forecasts and the county’s current estimate series were developed prior to the release of the 2020 Decennial Census data.
- Estimates - Present time and past years
- Forecasts - Future years through 2045
Demographic estimates are produced for years between decennial censuses, up to the present time. The reference date of the figures is April 1 of the specified year.
- 2021 Population: 427,642
- 2021 Households (Occupied Housing Units): 139,572
Current Estimate Series
- County- 2021 Estimates Series
Historic Decennial Census
- County- 1940 to 2010 Decennial Census
Demographic forecasts are produced using Loudoun County Government’s estimates as a basis. Forecasts reflect:
- Approved developments remaining to be built
- Land use constraints
- Long-range supply of land
- Market conditions
- Planned land use
- Recent development activity
- Rezonings
Sub-County Forecasts
Demographic forecasts are available for housing units, households, population, and employment. Loudoun County submits its TAZ forecasts to the Metropolitan Washington Council of Governments (COG). Forecasts are for Round 9.2 of the MWCOG population forecast series. Round 9.2 reflects land use changes based on the Loudoun County 2019 General Plan, as well as recent trends and the outlook as of 2020.
- Planning Subarea Forecasts (10 geographic areas)
- Traffic Analysis Zone Forecasts (282 geographic areas)