Mutual Security Credit Union 23 Hubbard Rd, Wilton, CT06897 Mutual Security Credit Union, which opened in 1982, is privately owned. It now has over 32,000 members with $224 million…More in assets. Mutual is a full-service banking institution that provides all personal financial needs to its lifetime members. Membership is available to individuals who live, work, worship or attend school in Fairfield, Litchfield or New Haven counties. Members enjoy services such as saving on rates, insured deposits, checking and savings accounts, visa cards, mortgage loans, home equity loans and auto loans.