Salt production in Traunstein was finally shut down in 1912.
 In 1914, the former independent community "Au" became part of Traunstein.

During the First World War what had previously been the site of the salt production facilities became a camp for over 1000 civilian prisoners and prisoners of war.
 After the war, the  1923 hyperinflation crisis as in other towns lead to the use of token money denominated in billions.

With the seizure of power of the National Socialists in 1933 began an active period of persecution for political dissidents and Jewish fellow citizens in Germany.
By November 1938 all Jewish residents of the town had been forcibly removed.
Open political resistance during the war years was limited; the town priest, Josef Stelze, was placed briefly in custody, Rupert Berger, Bavarian People's Party representative and the first post-war elected Mayor of Traunstein, was for a period incarcerated in the Dachau concentration camp.
In 1939 Traunstein had an estimated population of 11,500.
By the end of the war 523 of that number were registered as killed as a direct result of the conflict, a further 73 registered as missing.

During the later stages of the Second World War Traunstein was four times the target of U.S. Army Air Force aerial bombardment: on November 11, 1944, on January 21, 1945, on April 18, 1945, and finally on April 25, 1945.
In April 1945 the heavy air raids destroyed much of the Traunstein station area, an event in which over 100 people died.
A short time later, a death march with a few SS guards accompanied by 61 prisoners from the already-liberated Buchenwald concentration camp arrived; and on May 5th a massacre was carried out, resulting in 60 deaths, and only one survivor.
Currently in Surberg lies a memorial commemorating their deaths.
On May 3, 1945, the town surrended without struggle.

During World War II, a subcamp of Dachau concentration camp was located here.
Whereas Traunstein was a district-free city from 1948–1972, it became capital of the district of the same name in 1972.

Areas of Traunstein close to the River Traun have been subject to flooding on numerous occasions, most notably in 1899  and again in 2013.
Salt production in Traunstein was finally shut down in 1912.  In 1914, the former independent community "Au" became part of Traunstein.
During the First World War what had previously been the site of the salt production facilities became a camp for over 1000 civilian prisoners and prisoners of war.  After the war, the  1923 hyperinflation crisis as in other towns lead to the use of token money denominated in billions.
With the seizure of power of the National Socialists in 1933 began an active period of persecution for political dissidents and Jewish fellow citizens in Germany. By November 1938 all Jewish residents of the town had been forcibly removed. Open political resistance during the war years was limited; the town priest, Josef Stelze, was placed briefly in custody, Rupert Berger, Bavarian People's Party representative and the first post-war elected Mayor of Traunstein, was for a period incarcerated in the Dachau concentration camp. In 1939 Traunstein had an estimated population of 11,500. By the end of the war 523 of that number were registered as killed as a direct result of the conflict, a further 73 registered as missing.
During the later stages of the Second World War Traunstein was four times the target of U.S. Army Air Force aerial bombardment: on November 11, 1944, on January 21, 1945, on April 18, 1945, and finally on April 25, 1945. In April 1945 the heavy air raids destroyed much of the Traunstein station area, an event in which over 100 people died. A short time later, a death march with a few SS guards accompanied by 61 prisoners from the already-liberated Buchenwald concentration camp arrived; and on May 5th a massacre was carried out, resulting in 60 deaths, and only one survivor. Currently in Surberg lies a memorial commemorating their deaths. On May 3, 1945, the town surrended without struggle.
During World War II, a subcamp of Dachau concentration camp was located here. Whereas Traunstein was a district-free city from 1948–1972, it became capital of the district of the same name in 1972.
Areas of Traunstein close to the River Traun have been subject to flooding on numerous occasions, most notably in 1899  and again in 2013.
Traunstein