Köstendorf is a municipality in the district of Salzburg-Umgebung, in the state of Salzburg, Austria. It lies in the federal province of Salzburg in the west-central part of the country.
As a municipality, Köstendorf is one of the local administrative units within the Salzburg-Umgebung district, the district that surrounds the city of Salzburg. The state of Salzburg, of which it is part, is one of the nine federal states of Austria.
Beyond its administrative status, Köstendorf is a small community typical of the municipality-level divisions that make up the Salzburg region. Detailed information on its history, population, and landmarks is limited in the available source material.