Sitaro Islands Regency (, full name: Kabupaten Kepulauan Siau Tagulandang Biaro) is a regency located off the northern extremity of Sulawesi Island in the southern Sangihe Islands, North Sulawesi Province, Indonesia. The regency was formed under Law Number 15 Year 2007 from 2 January 2007 , by division of the Sangihe Islands Regency of which it had previously formed the southern part.