Sadda (Pashto: سده Sada) is a city in Kurram District in the Khyber Pakhtunkhwa province of Pakistan.

The nearest main city on the Afghan side of the border is Khost, which is located about 70 kilometres (43 mi) to the southwest of Sadda.

Sadda or Sadeh literary means "hundred", and is the name of an ancient Iranian winter festival, traditionally celebrated by kindling fires.

Being a trading point, it bustles with business activity attracting customers and traders from all over Kurram District.

It first was notified and recognized as an urban area between the 1981 and 1998 censuses of Pakistan.