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10. Utah

Total Returns: 1,134,626
Returns With Income Tax Liability: 699,598
Returns With No Income Tax Liability: 435,028
Nonpayers: 38.3%

According to the U.S. Census Bureau, the average number of persons per household in the state of Utah is 3.04. This is higher than the national average, and it’s one possible explanation for the large number of people paying no income tax.

“The two credits that cause most people to be nonpayers are the Earned Income Tax Credit and the Child Tax Credit, both of which increase with the number of children in your family,” Nick Kasprak, analyst and programmer at the Tax Foundation, said in an e-mail. “Utah might be on the list because it has, on average, the most people per household of any state.”

Mandi Coleman | Getty Images