What happened to fairfairfax credit union? Fairfax, Va.-based Fairfax County Federal Credit Union has become NextMark Credit Union. The $493 million credit union, which has about 17,000 members, said it expanded outside Fairfax County and that its name change would make it more inclusive for people in those new markets.Where is fairfax county federal credit union located? Fairfax County Federal Credit Union was chartered on April 29, 1958. Headquartered in Fairfax, VA, it has assets in the amount of $294,177,440. Its 14,413 members are served from 6 locations. Deposits in Fairfax County Federal Credit Union are insured by NCUA.How do i become a member of fairfax credit union? Membership: The credit union is a community-based financial institution. People living, working, or worshipping in the credit union's geographic area can become a member and access banking services. Membership is also open to immediate family of current members. Main Office Fairfax Business Hours Lobby Hours Sunday Closed Monday 10:00 am- 3:00 pmHow do i contact apple federal credit union in fairfax? View Other Locations Contact Apple Federal Credit Union Contact the Fairfax Corner Headquarterslocation at 4097 Monument Corner Drive by calling (703) 788-4800 or contact the credit union by any of these means: Phone: (703) 788-4800 Fax: (703) 667-8712 Mailing Address: