Poertschach am Woerthersee is a town in the district of Klagenfurt-Land in Carinthia in Austria.
It is the site of an annual tennis tournament, the Hypo Group Tennis International, which is part of the ATP Tour's International Series.
Poertschach is situated at 446 to 702 meters above mean sea level, on the northern shore of the Lake Woerth, about 14 km west of the Carinthian capital Klagenfurt.