Business Insider recently set on a mission to collect the data to find the most corrupt state in the United States. They used the number of convictions for corruption per capita.
If you just look at sheer number of convictions not based on per capita then Florida, New York, Texas, Pennsylvania and California are the top five.
The states with the fewest conviction rates were South Carolina, Oregon, Washington, New Hampshire, Minnesota and Utah.
Take a look at the chart below which is based on per capita!