| Köstendorf | |
| Pushpin Map: | Austria |
| Pushpin Mapsize: | 270 |
| Pushpin Map Caption: | Location within Austria |
| Coordinates: | 47.9572°N 13.1972°W |
| Subdivision Type: | Country |
| Subdivision Name: | Austria |
| Subdivision Type1: | State |
| Subdivision Name1: | Salzburg |
| Subdivision Type2: | District |
| Subdivision Name2: | Salzburg-Umgebung |
| Parts Style: | para |
| Leader Title: | Mayor |
| Leader Name: | Josef Krois |
| Elevation M: | 561 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Timezone Dst: | CEST |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Registration Plate: | SL |
| Postal Code Type: | Postal code |
| Postal Code: | 5203 |
| Area Code Type: | Area code |
| Area Code: | 06216 |
| Website: | www.koestendorf.at |
Köstendorf is a municipality in the district of Salzburg-Umgebung in the state of Salzburg in Austria.
Köstendorf lies 15 km northeast of the city of Salzburg on the Wallersee. It borders on the municipalities of Neumarkt am Wallersee, Seekirchen, and Schleedorf.