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 Sony BMG v. Tenenbaum, 2003 court case in the U.S. District Court for the District of Massachusetts Sony BMG Music Entertainment v. Tenenbaum, 2011 court case in the U.S. Court of Appeals for the First Circuit; appeals lawsuit for the prior case Tannenbaum (surname)
See also The Royal Tenenbaums, 2001 American comedy-drama film Tannenbaum Park, historic house in Greensboro, North Carolina, U.S.