Fairfax County Department of Family Services Share: Fairfax County Department of Family Services Visit Website 12011 Government Center Parkway Suite 708 Fairfax, VA 22035 (703) 324-5411 (703) 449-8689 (fax) Fairfax County Services for Older Adults Facebook Hours: Monday - Friday, 8 a.m. to 4:30 p.m. About Map About Fairfax Area Agency on Aging enhances the quality of life for older adults, adults with disabilities, and their family caregivers. What's Nearby? Distance: 5 10 15 20 25 50 mi.