Ethel Marie Armes (1876 – 1945) was an American journalist and historian.
Born in Washington, D.C., the daughter of Col. George Augustus Armes and Lucy Hamilton Kerr, Ethel was brought up in Washington, D.C. where she attended private schools. She worked as a reporter for the Chicago Chronicle in 1899 and then Washington Post during 1900–1903. In 1904 she became engaged to the Japanese poet Yone Noguchi and planned to join him in Japan, but broke off the engagement under scandalous circumstances. In 1905–06 she was on the Birmingham Age-Herald and performed syndicated work for magazines and newspapers. She authored a number of important historical works.
- Midsummer in Whittier's country (1905)
- The Story of Coal and Iron in Alabama (1910)
- Stratford on the Potomac (1928)
- Stratford Hall: The Great House of the Lees (1936)