Ellen Martin Henrotin (July 6, 1847 – June 29, 1922) was a wealthy American society matron, labor reform activist, club leader and social reformer affiliated with social welfare and suffrage movements.

[1][2][3] Henrotin was born on July 6, 1847, in Portland, Maine, the daughter of Edward Byam and Sarah Ellen Martin, and the second of six children.

[4] During her youth, she lived in England, and attended schools in London, Paris, and Dresden, 1860–68.

She was decorated by the Sultan of Turkey with the Order of the Chefakat, 1893; made an Officier de l'Académie by the French Republic, 1899; and decorated by Leopold II of Belgium with the Chevalier de l'Ordre de Léopold, 1904.

[5][7] Henrotin lived at 1215 Madison Avenue, in New York City.