Nearly one in four Fairfax County residents will be 65 or older by 2045, according to a new county report that projects the senior population will grow 68% over the next two decades.

For Reston, already in the county's fastest-growing district for housing, the data raises questions about whether parks, transit and community services can keep pace.

The county's 65-and-older population is projected to climb from 190,605 in 2025 to 320,966 by 2045. That dwarfs the county's overall population growth of 12% over the same period. The projections come from the 225-page Demographic Reports 2025, released Wednesday by the Fairfax County Department of Management and Budget.

Philip Hagan, director of the Department of Management and Budget, said the report provides "the localized data necessary to shape policies, plan intelligently and support the evolving needs of Fairfax County's residents and businesses."

The trajectory

Seniors currently make up 15.9% of the county's 1.2 million residents. That share climbs to 18.8% by 2030, 21% by 2035 and 23.9% by 2045. The broader 55-and-older group will grow from 28.1% to 35.1% of the population. By 2045, the county's estimated 471,300 residents aged 55 and older will exceed Fairfax County's entire population recorded in the 1970 census.

Fiscal pressure building

The county's adopted FY 2026 budget flags the challenge directly. Senior households earn a median income of $112,049, compared with $170,323 for households headed by someone ages 45 to 64. Older residents own fewer cars and may qualify for Real Estate Tax Relief, reducing county revenue at the same time demand grows for adult day care, senior centers and health services.

Separately, Hunter Mill District Supervisor Walter Alcorn, who represents Reston, warned in a May newsletter that the county has exhausted easy budget fixes after four years of trimming programs. "We have reached the end of our ability to make cuts in that way without causing real pain in our community," Alcorn wrote.

Reston's housing boom adds context

The Hunter Mill District, home to about 140,300 residents, is projected to see the highest housing unit growth of any district in the county at 25.8% through 2050, according to the county's 2024 demographic projections. A larger population base means more residents will age within the district over the projection period, and the area's average monthly rent of $2,154 could strain seniors on fixed incomes.

The county is expanding some local capacity. In May, the Board of Supervisors authorized a Comprehensive Plan amendment for the 16.5-acre Crescent Apartments site in Reston that would relocate and expand the Lake Anne Reston Community Center, increasing allowable non-residential space from 2,000 to 30,000 square feet. The move responds to community demand and aims to reduce class waitlists.

Transit gaps loom

Transit options in the Reston corridor are also shrinking. Fairfax Connector Route 552, connecting Innovation Center and Wiehle-Reston East, was discontinued in May after ridership fell to five passengers per hour, less than half the system average of 11.9. Route 950, linking Reston Town Center to Herndon Metro, saw peak-hour frequency drop from every 15 to every 20 minutes. Neither cut was tied to the senior projections, but the reductions raise questions about mobility options for future older residents who no longer drive.

Existing senior resources

Reston Community Centers offer programming for older adults including yoga, tai chi, and strength training, with an indoor pool at Hunters Woods and senior discounts on some classes. The Herndon Senior Center serves Reston residents with congregate meals Monday through Friday. Fairfax County also operates Meals on Wheels for residents over 60 with a disability.

The full demographic report breaks down data by magisterial district, ZIP code, and census tract. Residents can explore local figures at fairfaxcounty.gov/demographics.

Supervisor Alcorn's office and the Reston Association were not reached for comment on the senior population projections. This story will be updated with any response.