Barnum Brown
Brown in 1897
Born	February 12, 1872 Carbondale, Kansas
Died	February 5, 1963 (age 89) New York City, New York
Nationality	American
Known for	Discovered first documented remains of Tyrannosaurus rex
Scientific career
Fields	paleontology
Institutions	American Museum of Natural History

Barnum Brown (February 12, 1873 – February 5, 1963), often called Mr. Bones, was an American field paleontologist. He discovered the first documented remains of Tyrannosaurus rex. His career that made him one of the most famous fossil hunters working in the late Victorian era and the early 20th century.