The Mandarese are an ethnic group in the Indonesian province of West Sulawesi in Sulawesi. The Mandar language belongs to the Northern subgroup of the South Sulawesi languages group of the Malayo-Polynesian branch of the Austronesian language family. The closest language to Mandar is the Toraja-Sa'dan language.

West Sulawesi is a province of Indonesia. It borders the provinces of South Sulawesi and Central Sulawesi to the east, Makassar Strait to the west, and the Pacific Ocean to the south. The province also shares maritime borders with East Kalimantan and South Kalimantan to the west and West Nusa Tenggara to the south. It is located on the western side of Sulawesi island. It covers a land area of 17,152.99 km2, and its capital is the town of Mamuju. The 2010 Census recorded a population of 1,158,651, while that in 2020 recorded 1,419,228; the official estimate as at mid 2023 was 1,481,077.