Lexington MA Federal Credit Union 3 Fletcher Ave, Lexington, MA02420 Lexington MA Federal Credit Union is located on Fletcher Avenue at the corner of Woburn Street in Lexington Center. It…More opened in 1961. It has approximately 1,600 members. You must work for one of the following organizations in order to become a member of the Lexington MA Federal Credit Union: Town of Lexington, Minute Man Regional Vocational School, Arlex Oil Corporation, C&W Transportation, Scottish Rite Masonic or the National Heritage Museum. The credit union offers consumer loans, savings and checking accounts, credit cards and other services to its members. The Lexington MA Federal Credit Union is a member of the National Credit Union Asssociation (NCUA).