David Russell Williams (born March 7, 1963) is a convicted murderer, rapist, and former Colonel in the Canadian Forces.

From July 2009 to his arrest in February 2010, he commanded Canadian Forces Base Trenton, a hub for air transport operations in Canada and abroad and the country's largest and busiest airbase. Williams was also a decorated military pilot who had flown Canadian Forces VIP aircraft for Canadian dignitaries such as Queen Elizabeth II and Prince Philip, the governor general, the prime minister, and others.

On February 8, 2010, he was relieved as the base commander at CFB Trenton due to criminal charges. He was formally charged by the Crown Attorney pursuant to provisions set forth in the Criminal Code of Canada on evidence collected by the Ontario Provincial Police with two counts of first-degree murder along with two counts of forcible confinement and two counts of breaking and entering and sexual assault; another 82 charges relating to breaking and entry were subsequently added.

On October 21, 2010, Williams was sentenced to two life sentences for first-degree murder, two 10-year sentences for other sexual assaults, two 10-year sentences for forcible confinement and 82 one-year sentences for burglary; all the sentences will be served concurrently at Kingston Penitentiary. The life sentences mean Williams will serve a minimum of 25 years before parole eligibility. Since he has been convicted of multiple murders, Williams is not eligible for early parole under the so-called "faint hope clause" of the Canadian Criminal Code.

On October 22, 2010, Williams was stripped of his commission, ranks, and awards by the Governor General of Canada on the recommendation of the Chief of the Defence Staff. His severance pay was terminated and the salary he received following his arrest was seized, although he is still entitled to a pension. Subsequent to his conviction, his uniform was burned, his medals were destroyed and his vehicle crushed and scrapped.