Tannenbaum, and variations, may refer to:
The German term for fir tree
Tannenbaum, Arkansas
"O Tannenbaum", a Christmas carol of German origin
Operation Tannenbaum, the planned invasion of neutral Switzerland by Nazi Germany
Tanenbaum Center for Interreligious Understanding (or simply Tanenbaum), a New York-based non-profit organization
People with the surname
Tannenbaum
Abner Tannenbaum (1848–1913), Russian-American Yiddish journalist and writer
Albert Tannenbaum (1906–1976), American gangster
Allen Tannenbaum (born 1953), American/Israeli mathematician
Barry Tannenbaum, South African businessman
Benjamin Tannenbaum (1906–1941), New York mobster
Elhanan Tannenbaum, former captive Israeli officer and shady businessman
Emmanuel David Tannenbaum (1978-2012), Israeli/American biophysicist
Frank Tannenbaum (1893–1969), American sociologist
Judith Tannenbaum (born 1947), American teaching artist and writer
Leonard M. Tannenbaum (born 1971), American...