Marietta Slomka (born 20 April 1969 in Cologne) is a German journalist.
The daughter of a teacher, Slomka studied international politics and economics at the universities of Cologne and Kent. After university, she worked from 1991 to 1996 for Cologne Institute for Economic Research. In parallel, she started her career in journalism at local newspaper Kölnische Rundschau in 1994.
As television journalist, Slomka has been working on German broadcaster ZDF since 1998. Between 1998 and 2000, she worked as news correspondent in Bonn and Berlin. Since 2001, she has been the anchor of news magazine heute-journal on ZDF, in rotation with Klaus-Peter Siegloch (2003-2006), Steffen Seibert (2007-2010), Maybrit Illner (2010-2012), Claus Kleber (since 2003) and Christian Sievers (since 2013). Her co-anchor is Heinz Wolf.
Slomka lives in Cologne and Mainz.