Chaharmahal and Bakhtiari Province (Persian: استان چهارمحال و بختیاری‎, Ostān-e Chahār-Mahāl-o Bakhtiyārī ) is one of the 31 provinces of Iran. It lies in the southwestern part of the country. Its capital is Shahr-e Kord.

The province was put as part of Region 2 upon the division of the provinces into 5 regions solely for coordination and development purposes on June 22, 2014.

It has an area of 16,332 square kilometers, and had a population of 895,263 in 2011.