Lorenz S. Cederbaum (born 26 October 1946 in Braunschweig, Germany) is a German physical chemist. 
He studied physics at the University of Munich and obtained his diplome in 1970, his Ph.D. in 1972 under Georg Hohlneicher, and habilitation in 1976.  He was professor at the University of Freiburg before becoming professor for theoretical chemistry at the University of Heidelberg in 1979.
Cederbaum is member of the International Academy of Quantum Molecular Science and the Academy of Sciences Leopoldina.