Dr. Sally Jepng'etich Kosgey (born 1949), is a Kenyan politician. She belongs to ODM and was elected to represent the Aldai Constituency in the National Assembly of Kenya in the 2007 Kenyan parliamentary election. She was educated at Alliance Girls High School,. She obtained a BA degree from the University of Dar es Salaam in 1974. She later received her MA in 1975 and a Ph.D. in 1980, both from Stanford University in the United States.