Gertrude Emerson Sen (6 May 1890[1] – 1982) was an early 20th-century expert on Asia and a founding member of the Society of Woman Geographers.

[2] After teaching English in Japan,[6] Sen returned to the United States to become the associate editor of Asia magazine in 1917.

[7] In 1920 she undertook a round-the-world expedition with photographer Donald C. Thompson which included stunt flying and caving.

[11] Eventually she settled in Almora in northeastern India, participated in rural life, and came to love the culture of her adopted country.

[15] Emerson married Indian native Basiswar Sen on November 1, 1932, in Calcutta.