| Birth Name: | Elsie Margaret Binger |
| Birth Date: | July 7, 1880 |
| Death Date: | November 25, 1953 (age 73) |
| Nationality: | American |
| Spouse: |
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| Occupation: | Ornithologist |
| Parents: | Frances Newgass Binger Gustav Binger |
| Family: | Elkan Naumburg (father-in-law) Walter D. Binger (brother) Carl Binger (brother) |
Elsie Margaret Binger Naumburg (July 7, 1880 – November 25, 1953) was an American ornithologist.
Naumburg was born to a Jewish family in New York City, the daughter of Frances (née Newgass) and Gustav Binger.[1] She had three brothers: Robert Binger, Walter D. Binger, and Carl Binger. She studied at the Sachs Institute at the University of Frankfurt and at the University of Munich, and studied with Carl Edward Hellmayr for several years. On returning to the United States she joined the staff of the Bird Department at the American Museum of Natural History, under Frank Chapman. She specialised in South American birds.
Naumburg's most important work was on the birds of the Mato Grosso, based on collections made by George Kruck Cherrie during the Roosevelt–Rondon Scientific Expedition led by Theodore Roosevelt and Cândido Rondon. She later employed Emil Kaempfer to collect birds in southeastern Brazil.
Naumburg married Victor Reichenberger in 1908, and some of her early publications were under that name. Reichenberger died in 1913, and she married Walter W. Naumburg in 1923.