Helen "Eileen" Foley (née Dondero; February 27, 1918 – February 22, 2016) was an American politician. Foley served as the Mayor of Portsmouth, New Hampshire, eight terms from 1968–1971, 1984–1985, and 1988–1997. She remains the longest-serving mayor in the city's history. She represented the 24th District in the New Hampshire Senate for seven terms, including one term as the Democratic Party Minority Leader. Foley followed her mother, Mary (née Carey) Dondero, the first woman to become mayor of Portsmouth (1945-47), into politics.