Timothy James McVeigh (April 23, 1968 – June 11, 2001) was a United States Army veteran and security guard who detonated a truck bomb in front of the Alfred P. Murrah Building in Oklahoma City on April 19, 1995. Commonly referred to as the Oklahoma City Bombing, the attack killed 167 people, injured more than 684 people., and was the deadliest act of terrorism within the United States prior to the September 11, 2001 attacks. McVeigh, a militia movement sympathizer, sought revenge against the federal government for its handling of the Waco Siege, which had ended in the deaths of 76 people exactly two years earlier. He also hoped to inspire a revolt against what he considered to be a tyrannical federal government. He was convicted of 11 federal offenses and sentenced to death. His execution took place on June 11, 2001 at the Federal Correctional Complex, Terre Haute. Terry Nichols and Michael Fortier were also convicted as conspirators in the plot.

McVeigh was born in Lockport, New York, the only son and the second of three children of William and Mildred "Mickey" McVeigh. His parents divorced when he was 10 years old and he was raised by his father in Pendleton, New York.

McVeigh claimed to have been a target of bullying at school and that he took refuge in a fantasy world where he imagined retaliating against those bullies. At the end of his life he would state his belief that the United States government is the ultimate bully. Most who knew McVeigh remember him as being withdrawn, with a few describing him as an outgoing and playful child who withdrew as an adolescent. McVeigh is said to have had one girlfriend during his childhood, later stating to journalists he did not know how to impress girls. According to his authorized biography, "his only sustaining relief from his unsatisfied sex drive was his even stronger desire to die."