Harpo died at age 75 on September 28, 1964, their 28th wedding anniversary. Following his death, Fleming became more involved in local activities, including the local League of Women Voters. She became an advisory planning commissioner for Rancho Mirage, California, and headed an organization dedicated to preserving development on the fragile desert hillsides. She served a total of 18 years on the district board of education and ran and lost in a campaign for the California State Assembly. Honoring her contributions, a Golden Palm Star on the Palm Springs, California, Walk of Stars was dedicated to her in 2002.