All 50 states and the District of Columbia offer some sort of 529 plan. Many states offer more than one 529 plan, and most are open to residents of any state. Generally speaking, you should consider your state’s plan first if you pay state income tax. Many plans offer tax advantages for your state income taxes. (All plans offer benefits for federal income tax.) But carefully weigh the costs and performance of your state’s plan against other 529 savings plan options.