Founded in 1757, Loudoun County is a growing, dynamic county of over 450,000 people. Loudoun is known for its beautiful scenery, rich history, healthy diversity of expanding business opportunities, comfortable neighborhoods, and high-quality public services. The following demographics shape the county’s services and budget. POPULATION Loudoun County remains the 4th most populated county in Virginia, with a population increase exceeding 20 percent since 2015, including more than 7 percent from 2020 to 2025.
FY 2026 Population Projection: 462,063
100,000 0 200,000 300,000 400,000 500,000 600,000
2.2% 1.9%
4.7% 3.1%
6.4%
7.8%
14.2%
18.0%
20.5%
2015
2020 2025
2010
2030 2035
2050
2040 2045
Source: Decennial Census (2010,2020) Loudoun County Office of Management and Budget (2015, 2025), Metropolitan Washington Council of Governments Cooperative Round 10.0 Cooperative Forecast (2030-2050)
PATHWAY TO STABILIZATION
AGE COMPOSITION Age composition of our population is shifting
100% 90% 80% 70%
60% 50% 40% 30% 20% 10% 0%
Loudoun County has been a high-growth locality for decades, but projections show a transition to a stable-growth locality over the next two decades. Recognizing the need for a proactive response to these shifts in population, demographics, land use, and revenues, the county introduced the concept of the Pathway to Stabilization to ensure that its services and programs remain effective and responsive to residents’ needs.
2010 2015 2020 2025 2030 2035 2040 2045 2050
Age 0-4 Age 5-19 Age 20-24
Age 25-44 Age 45-64 Age 65+
Source: Moody’s Analytics, 2025
8 / FY 2026 BUDGET STORY, LOUDOUN COUNTY, VA
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