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.

Mamasa Regency is one of the six regencies that make up the West Sulawesi Province, Indonesia, on the island of Sulawesi. It covers a land area of 3,005.88 km2. The population was 140,082 at the 2010 Census and 163,383 at the 2020 Census; the official estimate as at mid 2023 was 170,354. Its capital is the town of Mamasa. The Mamasa people - which is a sub-group of the Toraja people - form the most common ethnic group.