MacMillan Bloedel Limited, sometimes referred to as "MacBlo", was a Canadian forestry company headquartered in Vancouver, British Columbia. It was formed through the merger of three smaller forestry companies in 1951 and 1959. Those were the Powell River Company, the Bloedel Stewart Welch Company, and the H.R. MacMillan Company. It was bought by Weyerhaeuser of Federal Way, Washington in 1999.