Ismailli State Reserve or Ismayilly State Reserve was established in Azerbaijan on an area of 57.78 square kilometres (22.31 sq mi) in 1981 for the preservation and protection of natural complexes, occupying the north part of the southern slope of Major Caucasus. The area of the reserve was expanded by 109.60 square kilometres (42.32 sq mi) and brought to 167 square kilometres (64 sq mi) in June 2003.