Bettina Hagedorn (née Siebmann, born 26 December 1955) is a German politician of the Social Democratic Party (SPD) who has been serving as a member of the German Bundestag since September 2002, representing Ostholstein - Stormarn-Nord. From 2018 to 2021, she also served as Parliamentary State Secretary in the Federal Ministry of Finance under minister Olaf Scholz in the fourth coalition government of Chancellor Angela Merkel.