Marianne Moore was born as the daughter of John Milton Moore and his wife Mary Warner in Kirkwood (Missouri ), a suburb of St. Louis, on 15 November 1887. She grew up with her brother at her maternal grandfather on. Her father, with whom she never had contact, suffered a nervous breakdown before her birth and was admitted to a psychiatric clinic. In 1894 she moved with her brother and her mother in Carlisle, Pennsylvania, where they private girls school in Bryn Mawr Pennsylvania attended from 1905. Marianne Moore was not an outstanding student, but they contributed to the development of the school's literary magazine at. Friendships were, among others, to Peggy James, the daughter of William James Psychologens. 1909 Marianne Moore graduated in biology and histology and was for four years teaching in writing, bookkeeping and English in Carlisle. One of her students was the athlete Jim Thorpe.
In 1915 she published her first poems and it came to contacts with other young aspiring poets and writers such as Wallace Stevens and William Carlos Williams. As Marianne Moore was 34 years old, she published her first book, which was published without her knowledge of his friend, Hilda Doolittle and writers Robert McAlmon.
From 1925 to 1929 she worked as executive editor of The Dial in New York. She received several awards. Among other things, the 1952 Pulitzer Prize and the National Book Award for the work Collected Poems. On February 5, 1972 Marianne Moore died at the age of 84 years in New York.