Auschwitz II-Birkenau was a Nazi-German extermination camp, near Brzezinka, Poland, within the Auschwitz concentration camp complex during World War II.
Birkenau may also refer to:
- Birkenau (Odenwald), a municipality in the Odenwald in southern Hesse in Germany
- Brzezinka or Birkenau, a Polish village
- Birkenau (painting), a cycle of four paintings by Gerhard Richter
