Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Digital Federal Credit Union (DCU) is a credit union based in Marlborough, Massachusetts. It has over 370,000 members and is the 12th largest credit union in the U.S.A. and the largest credit union in New England as measured by assets and among the top 15 nationwide. DCU has in excess of $4 Billion USD in assets. According to Callahan & Associates, a credit union consulting group, DCU has been one of the fastest growing large credit unions in America since 1995. DCU is regulated under the authority of the National Credit Union Administration (NCUA) of the US federal government.