Helen Eugenia Hagan (1891-1964) was an American pianist, music educator and composer of African descent.

Helen Eugenia Hagan was born in Portsmouth, New Hampshire, the daughter of John A. and Mary Estella Neal Hagan. She studied piano with her mother and then in the public schools of New Haven, Connecticut. Around the age of nine, she began playing organ for the Dixwell Avenue Congregational Church in New Haven.

She studied at Yale University with pianist H Stanley Knight and composer Horatio Parker, graduating in 1912 with a bachelor’s degree in music. She performed as soloist on her own Piano Concerto in C Minor in May 1912 with the New Haven Symphony Orchestra conducted by Parker. In doing so, she became the first known African American woman to earn a Yale degree. She received the Samuel Simmons Stanford scholarship to study in Paris, with Blanche Selva and Vincent d’Indy, and graduated from Schola Cantorum in 1914.

Hagan returned to the United States as World War I began and began a career as a concert pianist, touring from 1915 to 1918. In 1918 she was music director (meaning music department chair) at Tennessee Agricultural and Industrial State College. In early 1919 she left for France to entertain black troops of the American Expeditionary Forces, along with spirituals singer Joshua Blanton and the Rev. Henry Hugh Proctor, under the auspices of the YMCA. General John Pershing personally requested that Ms. Hagan entertain the troops.

In 1920 Hagan married John Taylor Williams of Morristown, New Jersey but continued her concert career. They divorced ca. 1931. She had a music studio in Morristown for at least a decade and was the first African American woman admitted to the Morristown Chamber of Commerce. She taught at the Mendelssohn Conservatory of Music in Chicago and pursued a Masters of Arts degree from Teachers College, Columbia University. In the 1930s she served as dean of music at Bishop College in Marshall, Texas. She also continued to work as a choir director and church organist. She died in New York City after an extended illness.