Jessie Annette Jack Hooper (November 9, 1865 – May 7, 1935) was an American peace activist and suffragist, who was the first president of the Wisconsin League of Women Voters.

In 1922 she ran against incumbent Robert M. La Follette for election to the United States Senate, a campaign which inspired her to organize women's groups to call for world disarmament.

It was not until 1908 that Hooper held an elected position with any civic organization, and even then attempted to shy away from the responsibility when her husband encouraged her nomination to fill a vacancy within the local chapter of the Daughters of the American Revolution.

[1] At the behest of National American Women's Suffrage Association (NAWSA) president Carrie Chapman Catt, Hooper and Minnie Fisher Cunningham toured Arizona, Nevada, New Mexico and Utah in 1919 and 1920 pressuring governors to call a special session to ratify the Nineteenth Amendment to the United States Constitution.

In Wisconsin the league's chapter carried the maxim "every woman an intelligent voter", and Hooper served two terms as its first president.

[2] Hooper invited 115 women nationwide to a 1924 brainstorming session, which eventually created the Conference on the Cause and Cure of War, a group that subsequently convened for several years.