| Königsseer Ache | |
| Mouth Coordinates: | 47.6257°N 13.0002°W |
| Subdivision Type1: | Country |
| Subdivision Type2: | States |
The Königsseer Ache is a river of Bavaria, in south-east Germany. At its confluence with the Ramsauer Ache in Berchtesgaden, the Berchtesgadener Ache is formed. It passes through the lake Königssee.