People in the United States have been executed by lethal injection, hanging, firing squad, electrocution and the gas chamber. States have shifted what methods they have used and when, with some pivoting over the years from hanging to electrocution to lethal injection (the most common method of execution).

This map, courtesy of the New Republic, is a great illustration of how states have killed inmates over the years:


(The New Republic)

Click for a larger version or head here.