The Mentawai Islands Regency are a chain of about seventy islands and islets approximately 150 kilometres (93 miles) off the western coast of Sumatra in Indonesia. They cover 6,033.76 sq2 and had a population of 76,173 at the 2010 Census and 87,623 at the 2020 Census. Siberut at 3,838.25 square kilometres (1,482 square miles) is the largest of the islands. The other major islands are Sipura, North Pagai (Pagai Utara) and South Pagai (Pagai Selatan). The islands lie off the Sumatran coast, across the Mentawai Strait. The indigenous inhabitants of the islands are known as the Mentawai people. The Mentawai Islands have become a noted destination for surfing, with over 40 boats offering surf charters to international guests.