Diane Meyer Simon (born Diane Irene Meyer) is an environmental activist, founder and leader of Global Green USA, member of the Green Cross International's (GCI) Honorary Board, and politician. She is the former wife of Indiana real estate billionaire Herbert Simon.
Meyer was an only child, born in 1946 to a French father and a Swiss mother. Her father worked as a teacher, an Air Force Pilot and medical doctor; and her mother worked as a teacher and a nurse. Simon earned B.A. in Psychology at Butler University in 1968. She went to Moscow to attend an international environment conference and met with Mikhail Gorbachev. After this conference, she became the GCI's Honorary Board. Simon also became Indianapolis's "Woman of the Year", and moved to California in 1989.
As a politician, she has worked as an administrator, political staffer for Senator Birch Bayh of Indiana, and as an organizer in the environmental field. Simon now lives in Montecito, California.
Meyer has been married twice. Her first husband was N. Stuart Grauel, the then Deputy Secretary of State of Indiana. In 1981, Meyer married billionaire shopping mall developer Herbert Simon. They divorced in 2000. They have three children: