Sheffield is a community in Sunbury County in the Canadian province of New Brunswick. It lies within the St. John River valley and is served by New Brunswick Route 105 (former Trans-Canada Highway) and New Brunswick Route 695.
See also: History of New Brunswick and List of historic places in Sunbury County, New Brunswick.
See main article: List of people from Sunbury County, New Brunswick. The founder of Burpee Seeds, W. Atlee Burpee was from Sheffield.