The New York Times has a nice graphic showing which parts of the country favor small banks and which favor large banks. Any bank with more than $65 billion in assets counts as "large" here, and that includes most of the national banks you've heard of: Citigroup, Bank of America, JP Morgan Chase, Wachovia, and Wells Fargo, among others.Why is this relevant? Well, big banks take more of your money in fees, and tend to take bigger risks. There's a campaign underway called Move Your Money that has more information and tips if you want to make the switch to a smaller bank.