South Buton Regency is a regency located on Buton Island in Southeast Sulawesi Province of Indonesia. This regency was formed from the southern part of Buton Regency, from which it was separated by Act No.16 of 2014, dated 23 July 2014. It covers an area of 546.58 km2, and the population of the districts now comprising the new regency was 74,974 at the 2010 Census and 95,261 at the 2020 Census; the official estimate as at mid 2023 was 101,635. The regency capital is located in Batauga.