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(Undated) -- Iowa is one of America's least-sinful states. WalletHub says Iowa is the 5th-least sinful state in the U.S. behind only Wyoming, Idaho, New Hampshire, and Vermont. WalletHub uses 47 key indicators of immoral or illicit behavior to make its rankings. Iowa's best categories are jealousy and share of people with a gambling disorder, ranking in the bottom 5 in both. WalletHub says the most sinful state is Nevada. A full list of states is available here.