Feigenbaum is a German surname meaning "fig tree". Notable people with the surname include:
Armand V. Feigenbaum (April 6, 1922 – November 13, 2014), American quality control expert
Clive Feigenbaum, stamp dealer
Edward Feigenbaum (born 1936), American computer scientist known as the "father of expert systems"
Joan Feigenbaum (born 1958), American computer scientist
Mitchell Feigenbaum (born 1944), American mathematical physicist
William M. Feigenbaum (1886–1949), New York assemblyman 1918
Yehoshua Feigenbaum (born 1947), Israeli footballer
