Gallup poll on most charitable and least charitable states shows that results can depend on how you parse the data (but by any measure, Utah wins).
"In the battle for the most generous states, the leaders depend on how you're measuring it. Gallup on Thursday released a poll that surveyed at least 600 people in each state asking how many have recently donated money to charity or volunteered their time. It found that Utah is by and large the most charitable state, with 71 percent of Utahans saying they donated money recently, while 56 percent say they volunteered time, and 48 percent say they did both." -- Matt Vasilogambros, the Atlantic