Lerke Osterloh (born 29 September 1944 in Wüsting-Holle near Oldenburg) is a German judge, jurisprudent and tax law expert. She was sitting Justice of the Federal Constitutional Court of Germany in the court's second senate from October 1998 until her retirement in November 2010. Her successor is . Along with Gertrude Lübbe-Wolff and Michael Gerhardt, she was considered a member of the senate's left-liberal wing.