Traiskirchen is a city and municipality in the district of Baden in Lower Austria, Austria. It lies about 20 km south of Vienna, in the Thermenlinie region, an area known for its wine and heurigers.
The town is home to the Traiskirchen Lions basketball team and has the oldest public astronomical observatory in Lower Austria.
Traiskirchen is also known for its refugee camp, the Bundesbetreuungsstelle für Asylwerber.