Navy Federal Credit Union NerdWallet’s rating: 3.5 / 5.0 Learn Moreat Navy FedWith more than 6 million members, Navy Federal Credit Union is the largest credit union in the U.S. by a long shot. And since Navy Federal caters to current and former military members and their families, it has the potential to grow much larger....The article Navy Federal Credit Union Review: Checking and Savings originally appeared on NerdWallet.