Baron Shaughnessy, of the City of Montreal in the Dominion of Canada and of Ashford in the County of Limerick, is a title in the Peerage of the United Kingdom. It was created in 1916 for the Milwaukee-born businessman Thomas Shaughnessy, president of the Canadian Pacific Railway Company. He was succeeded by his eldest son, the second Baron, a Director of the CPR and of the Canadian Bank of Commerce. His son, the third Baron, was a businessman and was also active in the House of Lords. However, he lost his hereditary seat in parliament after the House of Lords Act 1999.