Kaiserwald (Ķeizarmežs) was a Nazi concentration camp near the Riga suburb of Mežaparks in modern-day Latvia.

Kaiserwald was built in March 1943, during the period that the German army occupied Latvia.

Unlike Auschwitz or Treblinka, Kaiserwald was not an extermination camp, and the inmates were put to work by large German companies, notably Allgemeine Elektrizitäts-Gesellschaft, which used a large number of female slaves from Kaiserwald in the production of electrical goods, such as batteries.

On 5 August 1944, as the Red Army advanced westwards and entered Latvia, the Germans began to evacuate the inmates of Kaiserwald to Stutthof concentration camp, in Poland.

All Jews under 18 or over 30 were murdered along with anyone who had been convicted of any offense or anyone who it was thought would be unable to survive the trip from Latvia to Poland.