Esther Grether (born c. 1936) is a Swiss art collector and businesswoman. In 2013 Forbes estimated her and her family's net worth at $2.2 billion. Grether inherited a beauty and health care products company from her late husband Hans Grether in 1975 that she continues to run with her daughters. She has been Chairperson of the Board of the Basel based Doetsch Grether Group for more than thirty years, and is the second largest shareholder in The Swatch Group. She has served on the Swatch Group's Board of Directors since 1986.