| Oberfalkenstein Castle | |
| Native Name: | Burg Oberfalkenstein |
| Location: | Obervellach, Carinthia, Austria |
| Type: | Spur castle |
| Built: | 12th century |
Falkenstein Castle (Oberfalkenstein) is a ruined medieval castle near Obervellach in Carinthia, Austria. It was built in the 12th century as part of a larger fortification complex comprising the preserved advanced work of Niederfalkenstein below.