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Supiori Regency is a regency in the Indonesian province of Papua. The Regency has an area of 634.24 km2 including the Aruri Islands group to the south, and had a population of 15,874 at the 2010 Census and 22,547 at the 2020 Census; the official estimate as at mid 2024 was 24,527 - comprising 12,685 males and 11,842 females. Until 8 January 2004, this area was part of the Biak Numfor Regency, from which it was split off in accordance with the Law (Undang-Undang RI No.35 Tahun 2003) dated 18 December 2003.

Kabupaten Supiori merupakan Kabupaten Pemekaran dari Kabupaten Biak Numfor, Kabupaten yang dibentuk dengan Undang-Undang Nomor 35 tahun 2003, mempunyai wilayah daratan dengan luas sebesar 704,24 Km² dan wilayah perairan seluas 5.993 Km². Wilayah Kabupaten Supiori sebagian besar terletak di Pulau Supiori dan sebagian lainnya di Pulau Biak.

It comprises mainly the island of Supiori, one of the Biak Islands within Cenderawasih Bay off the north coast of Papua province (the rest of the Schouten Islands comprise the separate Biak Numfor Regency); the island is connected to Biak Island by a bridge across the Sorendi River (which is actually a narrow channel separating the two islands). The Supiori Regency also includes the Aruri Islands to the south of Supiori, comprising the small coral islands Aruri (Insumbabi) and Rani Island as well as over a hundred smaller islets. Its West Supiori District also includes Mapia Atoll to the northwest, approximately 290 kilometers north of the city of Manokwari.

Sorendiweri, the seat of the regency has a tropical rainforest climate (Af) with heavy rainfall year-round.