Turnše (pronounced [ˈtuːɾnʃɛ]; in older sources also Turnišče) is a settlement south of Radomlje in the Municipality of Domžale in the Upper Carniola region of Slovenia.

Črnelo Castle (German: Rottenbüchel) used to stand on Hribar Hill (Slovene: Hribarjev hrib) above Turnše. The castle was first mentioned in written sources in 1297 but at the end of the 17th century it was abandoned for a manor below the castle. The castle itself was probably used for building material because no trace of it remains today.