Ruth Ellen Brosseau (born April 26, 1984) is a Canadian politician. She was elected to the Canadian House of Commons as a New Democratic Party candidate in the 2011 federal election.

Brosseau is a single mother. She divides her time between Louiseville, Quebec in her riding of Berthier—Maskinongé and Gatineau, Quebec in th National Capital Region.

Brosseau's father, Marc, is a francophone who is also fluent in English. The Brosseau family lived in Hudson, Quebec until the younger Brosseau reached grade 2. From there, the family moved to Kingston, Ontario, where she continued to take French immersion classes.

Brosseau attended St. Lawrence College in Kingston. Her online biography initially indicated that she graduated from the college, but it was later clarified that she left before graduating, while being two credits short of completing her diploma. The NDP issued a statement that Brosseau had never claimed to have received a diploma, adding, "When her bio was posted on our website, a party staffer inadvertently changed the wording. We apologize for posting this information in error and regret any inconvenience this has caused Ms. Brosseau."