Sidonia Elżbieta Jędrzejewska (born 5 November 1975 in Kraków) is a Polish politician and MEP.
Sidonia Jędrzejewska graduated from the Adam Mickiewicz University in Poznań with a degree in sociology.
Among others, she has held scholarships from MENiS, the German Academic Exchange Service and the Stefan Batory Foundation.
She worked as an administrator in the Secretariat of the European Parliament's Committee on Budgets and a research assistant at the University of Central Europe in Warsaw.
From January 2008 until June 2009, she was the Undersecretary of State in the Office of the Committee for European Integration in Poland.