Chak, The one of the smallest ethnic groups in Bangladesh. The Chaks entered the Chittagong Hill Tracts in the 14th century after their kingdom was overrun by the Arakanese. Still there are Chaks living in Arakan. A smaller number of Chak live across the border in the Chittagong Hill Tracts of Bangladesh. Approximate 3,000 Chak peoples are living in Bangladesh. In both nations the Chak rely on simple agriculture and hunting to survive. They rarely venture outside their communities.

Chak people speaks in Sak language and more than 99% of Chak peoples are Buddhist and the rest are Christian in Bangladesh.