William Francis Kemmler was an American peddler, alcoholic, and murderer, who, in 1890, became the first person in the world to be executed by electric chair. He was convicted of murdering Matilda "Tillie" Ziegler, his common-law wife, a year earlier. Although electrocution had previously been successfully used to kill a horse, Kemmler's execution did not go smoothly.

The electric chair is a specialized device employed for carrying out capital punishment through the process of electrocution. During its use, the individual sentenced to death is securely strapped to a specially designed wooden chair and electrocuted via strategically positioned electrodes affixed to the head and leg. This method of execution was conceptualized by Alfred P. Southwick, a dentist based in Buffalo, New York, in 1881. Over the following decade, this execution technique was developed further, aiming to provide a more humane alternative to the conventional forms of execution, particularly hanging. The electric chair was first utilized in 1890 and subsequently became known as a symbol of this method of execution.