Henry J. Pariseau Jr. (April 1, 1918 – May 30, 1970) was an American politician who briefly served as the 45th mayor of Manchester, New Hampshire, in 1970 as a member of the Republican Party.

Pariseau, a Republican, became the 45th mayor of Manchester, New Hampshire, in 1970, serving until his death in office five months into his term.

During his short tenure as mayor, Pariseau was instrumental in obtaining firefighting apparatus for the city, and concern for the environment led to his involvement in the Urban Beautification project, designed to create a pollution-free environment.

Pariseau was president of the Holy Name Society, St. Vincent de Paul, and the New Hampshire Truck Owner's Association.

Additionally, he was a founding member of the 100 Club of New Hampshire and was active in the Pine Haven Home for Boys.