Curtin Winsor Jr. (born April 28, 1939) is a former Ambassador of the United States to Costa Rica.
Winsor was born in Philadelphia, Pennsylvania, on April 28, 1939, and graduated from Brown University in 1961 with a degree in English literature.
Winsor subsequently worked for Chase Manhattan Bank and several non-profit concerns focusing on international and free-trade issues.
Winsor was a foreign-policy adviser to former California Governor Ronald Reagan in his successful 1980 presidential campaign.
Winsor is the founder and past owner of the American Chemical Services Company of Marmet, West Virginia, which has produced chemicals for controlling dust and frozen coal for coal mines and users since 1981.