The snow struck as the group crossed a mountainous area in the Shounter Pass with their goat herds.
A further 25 people have been injured and a rescue operation is ongoing.
Pakistan's Prime Minister Shehbaz Sharif expressed grief over the deaths, and said incidents such as avalanches were increasing due to climate change.
The avalanche happened in the early hours of Saturday in part of the pass that bridges the Astore district of the Gilgit Baltistan region to neighbouring Azad Kashmir, in Pakistan-administered Kashmir.
