Thedford is a small community in northwestern Lambton County, Ontario Canada, situated 8 km south of Kings Highway 21, along Lambton CR 79 (Former Kings Highway 79). The community began in the 1860s when farmer Nelson Southworth, a native of Vermont, agreed to donate land for the construction of a Grand Trunk Railway station, with the condition that he would be able to name it. Southworth chose the name "Thetford", as a way of honouring Thetford, Vermont, a community in his home state in the United States. A local clerk's poor hand writing was mistaken for the current spelling, which is how it first appeared on official records. The Thedford Raiders Hockey Team once held the World Record for Longest Continuous Hockey Game, which was also a fundraiser for juvenile diabetes. A plaque at the entrance of the town heralds it as the "Onion Capital of Canada". A designated place within the municipality of Lambton Shores, Thedford had a population of 822 in the Canada 2006 Census.Thedford and the surrounding area is served by Execulink Telecom for telephone, cable TV and Internet services. Thedford telephone numbers start with 519-296.