Josephine Preston Peabody (May 30, 1874 – December 4, 1922) was an American poet and dramatist. She was born in New York and educated at the Girls' Latin School, Boston, and at Radcliffe College.
From 1901 to 1903 she was instructor in English at Wellesley. In 1906 she married Prof. L. S. Marks from Harvard University. The Stratford-on-Avon prize went to her in 1909 for her drama The Piper, which was produced in England in 1910; and in America at the New Theatre, New York City, in 1911.
On June 21, 1906 she married Lionel Simeon Marks, a British engineer and professor at Harvard University. They had a daughter, Alison Peabody Marks (July 30, 1908 – April 7, 2008), and a son, Lionel Peabody Marks (b. 10 February 1910)