The Cederberg mountains are located near Clanwilliam, approximately 300 km north of Cape Town, South Africa at about 32°30′S 19°0′E. The mountain range is named after the endangered Clanwilliam cedar (Widdringtonia cedarbergensis), which is a tree endemic to the area. The mountains are noted for dramatic rock formations and San rock art. The Cederberg Wilderness Area is administered by CapeNature.

Cederberg is now the generally accepted spelling for the area, which combines the English (Cedarberg) and Afrikaans (Sederberg) variants.