Chojnik Castle is a castle located above the town of Sobieszów, today part of Jelenia Góra in southwestern Poland. Its remains stand on top of the Chojnik hill within the Karkonosze National Park, overlooking the Jelenia Góra valley.
The building of the fortress dates back to the times of the Silesian Piasts and for most of its time was in the possession of the Schaffgotsch noble family. Today the semi-ruined stronghold is a major tourist attraction and houses a hotel and a restaurant.