Sachs is a German surname meaning "man from Saxony" and may refer to:

Fritz Gunter Sachs (14 November 1932 – 7 May 2011) was a German photographer, author, industrialist, and latterly head of an institute that researched claims of astrology. As a young man he became a sportsman, then gained international fame as a documentary film-maker and documentary photographer. He was interested in astrology and its connection with mathematics and statistics.

Sachs was born in southern Germany. His mother was the daughter of Wilhelm von Opel; his father was Willy Sachs, sole owner of Fichtel & Sachs, a leading manufacturer of ball bearings and one of Germany’s biggest automobile suppliers. Willy was known to Hermann Göring and Heinrich Himmler and arrested by the American military after the war but finally declared a follower and released. Gunter Sachs commented on his father’s past in several publications. Willy committed suicide in 1958 by shooting himself. Sachs' brother, Ernst Wilhelm, died in an avalanche in 1977.

A playboy in his early years, Sachs was romantically linked to the former Iranian queen Soraya Esfandiary. He married three times. His first wife, Anne-Marie Faure, died in 1958 during surgery. He courted his second wife, Brigitte Bardot, by flying over her villa on the French Riviera in a helicopter and dropping hundreds of roses. The couple were married on 14 July 1966 in Las Vegas; they divorced in 1969. His final marriage was to Swedish former model, Mirja Larsson, (who was 26 at the time of their engagement) which lasted from 1969 until his death. He had a son Rolf Sachs (born 1955), with his first wife, and a further two sons (Christian Gunnar and Claus Alexander) with his third wife.

Jeffrey David Sachs (/ˈsæks/; born November 5, 1954, in Detroit, Michigan) is an American economist and Director of The Earth Institute at Columbia University. One of the youngest economics professors in the history of Harvard University, Sachs became known for his role as an adviser to Eastern European and developing country governments during the transition from communism to a market system or during periods of economic crisis. Subsequently he has been known for his work on the challenges of economic development, environmental sustainability, poverty alleviation, debt cancellation, and globalization.

Sachs is the Quetelet Professor of Sustainable Development at Columbia's School of International and Public Affairs and a Professor of Health Policy and Management at Columbia's School of Public Health. He is Special Adviser to United Nations Secretary-General Ban Ki-Moon on the Millennium Development Goals, having held the same position under former UN Secretary-General Kofi Annan. He is co-founder and Chief Strategist of Millennium Promise Alliance, a nonprofit organization dedicated to ending extreme poverty and hunger. From 2002 to 2006, he was Director of the United Nations Millennium Project's work on the Millennium Development Goals, eight internationally sanctioned objectives to reduce extreme poverty, hunger, and disease by the year 2015. Since 2010 he has also served as a Commissioner for the Broadband Commission for Digital Development, which leverages broadband technologies as a key enabler for social and economic development.