Melanie Leonhard (born 14 July 1977) is a German politician (SPD) and historian. Since October 2015, she is Hamburg Senator for Labor, Social Affairs, Family and Integration and since March 2018 State Chairwoman of the SPD Hamburg. From 2011 until the appointment to the Senates Scholz II and Tschentscher, she was SPD Member of the Hamburg Parliament.
Leonhard was born and grew up in Wilhelmsburg, Hamburg. Her father worked for a petroleum company. After attending high school Lessing-Gymnasium, which she completed in 1996, she performed a Voluntary social year. Afterwards she studied social and economic history at the University of Hamburg from 1998 to 2004 with minor subjects in Politics and Geography. There she received her doctorate in 2009 with a thesis on the development of a family business, the Rickmers family of ship owners and shipbuilders in German shipbuilding and German shipping from 1834-1918. From 2008 to 2013 she was a research associate at E.R. Capital Holding, the holding company of E.R. Schiffahrt and Nordcapital, and from 2013 to 2015 she was head of the Department of Urban History Harburg of the Archaeological Museum Hamburg.
Leonhard has been a member of the SPD since 1999 and represented her party from 2004 to 2011 at the Harburg district assembly. In the state election in Hamburg in 2011, she was elected on place 9 of the state list to the Hamburg Parliament. There she was a member of the Family, Children and Youth Committee, the Interior Committee, the Urban Development Committee, as well as the special committee on the death of the girl Chantal.
In the state election in Hamburg in 2015, she ran on place 6 of the state list and moved again into the state parliament. On 1 October 2015 she followed Detlef Scheele as a senator and head of the Hamburg Authority of Labor, Social Affairs, Family and Integration. Since then, her parliamentary mandate has rested under Article 39 of the Hamburg constitution.
On 24 March 2018, Leonhard was elected with 94.6 percent of the delegate votes as the successor of Olaf Scholz, the Federal Finance Minister in the cabinet Merkel IV, as state chairwoman of the SPD Hamburg.
Leonhard is married and lives with her husband and son in Marmstorf, Hamburg.