Harry Falconer McLean (18 February 1881 - April 1961) was a Canadian railway contractor and eccentric philanthropist. He played a leading role in the construction of much of the trans-Canadian railways. He was well known for giving away large sums of money to people he had just met, and even throwing bills from hotel windows.

McLean was born in North Dakota, the son of Canadian parents. He studied at the North Dakota Business School in Fargo.^{[citation needed]}

McLean began work on the railways as a water boy for the Winston Brothers, and over the years moved up the ranks, eventually becoming president of the Dominion Atlantic Railway company.^[1]

McLean frequently handed out cash or cheques to people he encountered, including hotel staff and taxi drivers. He made many other private, anonymous donations, which led to him being known as Mr X until his identity was revealed, without his consent.^{[citation needed]}

McLean lived in Merrickville, Ontario, on the Rideau Canal. He was first married to Irene Robertson. His second wife was Margaret K. Fitzpatrick, known as Rita, to whom he was married until his death. As a lad, I remember sneaking into his property with some pals to see his private Zoo of animals and birds. Legend is he was clawed by his mountain lion one day, so he returned to the house, got a rifle, and shot the lion dead.^{[citation needed]}

A pub in Merrickville, Ontario now bears his name, in addition to an H. F. McLean Road.^{[citation needed]}

• Charland, Theresa (2007). Building an Empire: "Big Pants" Harry F. McLean and his Sons of Martha, Ontario: Riparian House
• Finnigan, Joan Giants of Canada's Ottawa Valley, Ontario: General Store Publishing House
• Barnes, Michael (1995) Great Northern Characters, Ontario: General Store Publishing House

• "Canada at War: Ontario: Golden Boy" at Time
• Republicofmining.com
• Ontario Marches North