The largest turkey was named Tyson and weighed 86 lbs, according to the National Wild Turkey Foundation. Tyson belonged to a farmer named Philip Cook from the UK. This record was set in 1989 during the Heaviest Turkey Competition in London. Tyson made Guinness Book of World Records history. However, the Guinness Book of World Records does not have an updated link to the page about Tyson the Turkey, so the turkeys present weight is unknown.