And this is the number relative to the population size of each state:
There’s also an interactive version of the first map here, where you can find more information on the groups involved. The Southern Poverty Law Center counted 926 active hate groups in the U.S. in 2008. Since 2000, the number has climbed by more than 50 percent. A hate group is a group that has beliefs or practices that attack or malign an entire class of people, typically for their immutable characteristics. White nationalists, neo-Nazis, racist skinheads, border vigilantes and black separatist organizations are examples of hate group. Their activities can include criminal acts, marches, rallies, speeches, meetings, leafleting or publishing, but not necessarily advocacy of or engagement in violence or other criminal activity.