Over QCU's 80 year history, the field of membership has expanded to include municipal workers in the City of Quincy and family members to the present operating charter to include residents or employees in Norfolk and Plymouth Counties, the Community of Dorchester and their family members. Quincy Municipal City Workers and their family members still comprise a significant number of QCU's over 31,000 Members. This large percentage is due in part by the loyalty of Members who refer their family and friends for their first mortgage, auto loan, or savings plan.