Lucie Fulton Isaacs (January 18, 1841 – November 20, 1916) was an American writer, philanthropist, and pioneer suffragist. As a writer of essays and descriptive articles, she was known to early readers of the Overland magazine and other western periodicals under various pen names, suffering from shyness that made her shrink from publicity. She was a co-organizer of the first woman's club in Walla Walla, Washington, a member of the Oregon Pioneer Association, and a supporter of the arts. Isaacs served as president of Walla Walla's suffrage association, lived to see full suffrage given to women, and voted before her death in Walla Walla, November 1916.