The United Services Automobile Association (USAA) is a Texas-based Fortune 500 diversified financial services group of companies including a Texas Department of Insurance regulated reciprocal inter-insurance exchange and subsidiaries offering banking, investing, and insurance to people and families that serve, or served, in the United States military. At the end of 2014, there were 10.7 million members.USAA was founded in 1922 by a group of U.S.