Barrow-in-Furness (; commonly known as Barrow) is a town and seaport in the county of Cumbria, England. Historically part of Lancashire it was incorporated as a municipal borough in 1867 and merged with adjacent districts in 1974 to form the Borough of Barrow-in-Furness. Situated at the tip of the Furness peninsula close to the Lake District it is bordered by Morecambe Bay, the Duddon Estuary and the Irish Sea. In 2011 Barrow's population stood at around 57,000, while 69,000 lived in the wider borough making it the second largest urban area in Cumbria after Carlisle. Natives of Barrow as well as the local dialect are known as Barrovian.