Serial killers can - and do - live in cities big and small across the United States. If I were to ask you which states have the highest percentage of serial killers, per capita, you might guess California, New York, Illinois, or Texas. According to data shared by the folks at Metal Floss, certain states have a substantially higher concentration of serial killers than others. Wyoming takes the #1 spot , with 8 known serial killers who killed a total of 32 known victims. The Bands 10 Infamous Serial Killers Loved The favorite musicians and songs of infamous serial killers.