Forty-eight of the 50 counties whose residents gave the highest proportion of their income to charity in 2013 were located in those areas, according to recently released IRS figures detailing itemized tax returns. Several of the counties reporting the highest rates of giving are in impoverished areas of Mississippi, Texas and Alabama.
Religion likely plays a big role in explaining the numbers. A large proportion of charitable giving in those places goes to churches. Residents in Utah and Idaho, home to large Mormon populations, and the South, a center for evangelical Christians, are encouraged from the pulpit to tithe, the practice of giving 10 percent of one's income to church.