William Hawrelak (October 3, 1915 – November 7, 1975) was a politician in Alberta, Canada, the longest-serving mayor in Edmonton's history, and a candidate for election to the Canadian House of Commons.
Hawrelak was born in Shandro, Alberta to Ukrainian immigrants William and Anastasia Hawrelak (the family's ancestral name was Гавриляк (Havryliak)). He married Pearl Shandro (daughter of Alberta MLA Andrew Shandro, after whom Hawrelak's hometown was named) the pair would have three daughters.
In 1945, Hawrelak moved to Edmonton and purchased the Prairie Rose Manufacturing Co., which made soft drinks. He served as president of the Alberta Farmer's Union and of the Edmonton Federation of Community Leagues before entering politics.
Hawrelak's first attempt at political office took place in the 1948 municipal election, in which he ran for Edmonton City Council and was defeated, finishing seventh of twelve candidates for alderman. He was more successful in the next election, winning the last available aldermanic position by finishing sixth of nine candidates after being backed by the Citizens' Committee, a municipal political party dominated by Anglo-Saxon businessmen.