There are 43 States and the District of Columbia (DC) which impose state income tax on individuals. The highest rate charged in that state is listed. Type in the 2 letter State or District Code to match the rate. For Instance 0% = WA since this state imposes no income tax. NY City also has an income tax max rate of 3.4% but not listed here. There are multiple states with the same rate (i.e. 5%). The states are listed in alphabetical order with same rate. This quiz is easy but it also gives you a comparison of tax rates.