|바하사 찌아찌아 Bahasa Ciacia|
|Region||Buton Island, Sulawesi|
|Native speakers||80,000 (as of 2005) (date missing)|
|Writing system||Hangul (as of 2009), formerly Gundul|
The Cia-Cia language (Hangul: 바하사 찌아찌아, Roman: Bahasa Ciacia), also known as South Buton(ese), is an Austronesian language spoken principally around the town of Bau-Bau on the southern tip of Buton Island off the southeast coast of Sulawesi in Indonesia.