Zotique Mageau (April 6, 1865 – ?) was an Ontario merchant, notary and political figure. He represented Sturgeon Falls in the Legislative Assembly of Ontario as a Liberal member from 1911 to 1926.
He was born in Sainte-Julienne, Quebec, the youngest son of Fabien (Felix) Mageau and Judith Roy. In 1887, he married Saladine Serré; he married Clara Perrault in 1912 after her death. He opened a general store in Sturgeon Falls with his brother-in-law, Eugène Serré. He also established a lumber company, and was one of the founders of Sturgeon Falls, Ontario.