Petra Gerster [ˈpʰeːtʁaˈgɛᵊstɐ] (born 25 January 1955) is a German journalist and news presenter.

Gerster began her career as a newspaper journalist with Kölner Stadt-Anzeiger.

She was a presenter on the German women's magazine show Mona Lisa for ten years.

[1] From 1998 until 2021, Gerster worked as anchor for ZDF's daily news magazine heute, in rotation with Peter Hahne (1998–1999), Klaus-Peter Siegloch (1999–2003), Steffen Seibert (2003–2010), Matthias Fornoff (2010–2014) and Christian Sievers (2014–2021).

Gerster is the sister of politician Florian Gerster and is married to journalist and politician Christian Nürnberger.