Born in New York on June 22, 1888, Seeger moved with his family to Staten Island at the age of one and remained there until the age of 10. In 1900, his family moved to Mexico for two years, which influenced the imagery of some of his poetry. His brother Charles Seeger, a noted musicologist, was the father of the American folk singer, Pete Seeger. Seeger entered Harvard in 1906 after attending several elite preparatory schools, including Hackley School.