Lethal injection
Between 1915 and 2014, Oklahoma executed a total of 192 men and 3 women. 3 different methods of execution have been employed by the state. Lethal injection, which was first used on September 10, 1990 has been used 112 times. Other execution methods have included the hanging of a federal prisoner, and 82 electrocutions using the electric chair commonly referred to as "Old Sparky", a method that was last performed in 1966.