Sisakht (Persian:سي سخت; Lurish: سي سخت , SỉSext, also Romanized as Sīsakht and Sī Sakht; also known as Deh Bozorg-e Sīsakht, Deh Bozorg-e Sīsākht, and Deh-e Bozorg Sīsakht) is a city in and the capital of Dana County, Kohgiluyeh and Boyer-Ahmad Province, Iran. At the 2006 census, its population was 6,342, in 1,528 families.