| Fullerö Castle | |
| Location: | Västerås Municipality, Sweden |
| Coordinates: | 59.5475°N 16.5458°W |
| Type: | Castle |
Fullerö Castle is a castle and fideicommissum since 1739,[1] in Barkarö, Sweden. Augustin Ehrensvärd, who was in charge of building the Suomenlinna (Sveaborg) fortress, was born in Fullerö Castle. The comital family Cronstedt acquired the castle in the 17th century.[2]