William Henry Schmalz (1862 – 1933) was an insurance company executive and politician in Ontario, Canada. He served as mayor of Kitchener from 1911 to 1912. Schmalz's parents came to Ontario from Hesse in 1854. In 1878, he joined the Economical Mutual Fire Insurance Company as a policy writer. In 1908, he became managing director. Schmalz worked for the company until 1933. Schmalz served 18 years on the hospital board, including three as president. He was also a member of the Board of Trade. With W.J. Morris, he managed the Berliner Journal.