| Sidney G. Winter | |
| Birth Name: | Sidney Graham Winter |
| Birth Date: | 1935 |
| Birth Place: | Iowa City, Iowa, U.S. |
| Spouse: | Alice Rivlin (m. 1989) |
| Nationality: | American |
| Field: | Evolutionary economics |
| Repec Prefix: | e |
| Repec Id: | pwi51 |
| School Tradition: | Evolutionary economics |
Sidney Graham Winter (born 1935, in Iowa City, Iowa) is an American economist and Professor Emeritus of Management at the Wharton School, University of Pennsylvania. He is recognized as a leading figure in the revival of evolutionary economics.
In 1982, he co-published with Richard R. Nelson An Evolutionary Theory of Economic Change, a book which has since been cited nearly 25,000 times.
Winter was Chief Economist of the US General Accounting Office (1989-1993). He won the Viipuri Prize for Strategic Management in 2008.
Winter was the second husband and widower of economist Alice Mitchell Rivlin.