Burg Leofels, Medieval castle in Ilshofen, Germany.

Burg Leofels is a medieval castle near Ilshofen that rises on a promontory at about 405 meters above sea level. The structure features thick shield walls and a stone bridge that spans a wide ditch.

The castle was built between 1220 and 1250 during Emperor Frederick II's reign but appeared in documents as early as 1208. It later became the property of the von Vellberg family and was part of the regional power structure of that period.

From 1979 to 2000 the ruin hosted the multi-day folk festival Burgruine Leofels almost every year, organised by the now-dissolved Festival Leofels e. V. Long John Baldry, Whippersnapper, Liederjan, Colin Wilkie, Albion Band and Thomas Felder were among the performers. Today the castle is used in summer for theatre performances and concerts.

The site is accessible via several hiking trails, including the Leofelser Blade loop from Ruppertshofen and longer routes along the Jagstaue river. Sturdy footwear is recommended since the paths cross uneven terrain and woodland areas.

The shield wall (Schildmauer) is built of bossed ashlar blocks (Buckelquader) and is dated to around 1230; it is the best-preserved part of the ruin. Leofels is thought to have been an imperial castle (Reichsburg). The bergfried was already demolished in the 18th century, and after a lightning strike in 1707 and the sale of roof tiles in the 19th century the other buildings decayed.