Mittersill is a city in the federal state of Salzburg, Austria, in the Pinzgau region of the Alps. It is located on the Salzach River. It has a populati…Mittersill is a city in the federal state of Salzburg, Austria, in the Pinzgau region of the Alps. It is located on the Salzach River. It has a population of 5,408 as of 2011. Mittersill lies approximately 25 km to the west of Zell am See, 30 km to the south of Kitzbühel and 27 km east of the start of the Salzach Valley in Krimml.