Stefan Birkner (born 12 April 1973 in Münsterlingen) is a German lawyer and politician for the Free Democratic Party (FDP).

From January 2012 until 2013, he served as State Minister for Environment, Energy and Climate Protection in the government of Minister-President David McAllister.

In September 2017, Birkner succeeded Christian Dürr as chairman of the FDP's parliamentary group.

[2] Birkner was nominated by his party as a delegate to the Federal Convention to elect the President of Germany in 2022.

[4] In April 2023, he was nominated by Federal Minister for Digital and Transport Volker Wissing to lead the executive board of the Autobahn GmbH, a state-owned entity;[5] amid public criticm around the appointment, he withdrew his name from consideration.