Turjak Castle is a 13th-century castle located above the settlement of Turjak, part of the municipality of Velike Lašče in the Lower Carniola region of Slovenia. The castle is 20 km southeast of Ljubljana and is considered among the most impressive in the area.

Turjak is a settlement in the Municipality of Velike Lašče in central Slovenia. The entire municipality is part of the traditional region of Lower Carniola and is now included in the Central Slovenia Statistical Region.