Marilyn Gladu MP (née McInerney;[citation needed] born 1962) is a Canadian politician who has been the Conservative Member of Parliament for Sarnia—Lambton since 2015.

During her career, Gladu was the chair for the Canadian Society of Chemical Engineers locally, and the national director of science and industrial policy for the same organization.

In 2016, she sponsored a private member's bill (C-277), "An Act providing for the development of a framework on palliative care in Canada" which became law in December 2017.

Sarnia Mayor Mike Bradley called Gladu's comments "surprising, disappointing and not reflective of what medical experts in Canada and the United States have been saying.".

Conservatives subsequently brought a unanimous consent motion to pass the amended conversion therapy bill at all stages in 2021.