Pia Elda Locatelli (born 13 August 1949 in Villa d'Almè, Bergamo) is an Italian politician and Member of the European Parliament for North-West with the Italian Socialist Democrats, part of the Socialist Group and sits on the European Parliament's Committee on Industry, Research and Energy and its Committee on Women's Rights and Gender Equality.
She is a substitute for the Committee on Employment and Social Affairs and a member of the Delegation for relations with Iran.
From 2008 to 2010 she was the President of the Italian Socialist Party. In the 2013 Italian general election she was elected in the Chamber of Deputies with the Democratic Party, representing the PSI.
