Lodewijk Frans Asscher (; born September 27, 1974) is a Dutch politician of the Labour Party (PvdA). He has been the Deputy Prime Minister of the Netherlands and Minister of Social Affairs and Emloyment in the Cabinet Rutte II since November 5, 2012. He previously served as Acting Mayor of Amsterdam from March 12, 2010 to July 7, 2010 after Job Cohen resigned as Mayor to become the Labour Party leader and lijsttrekker (top candidate) for the Dutch general election of 2010.