Western Subanon (also known as Siocon Subanon or simply Subanon) is an Austronesian language belonging Subanen branch of the Greater Central Philippine subgroup. It is spoken by c. 300,000 people () in the southwestern part of the Zamboanga Peninsula region of Mindanao.
The Western Subanon speech area includes the villages Malayal, Lintangan, Lanuti, and Limpapa in the municipality of Sibuco, and parts of Siocon, Baliguian, Labason, Surabay, and Ipil, all located in the Zamboanga Peninsula region. The dialects are Siocon and Western Kolibugan (Western Kalibugan).
Western Subanon has 15 native consonants.
Western Subanon has five vowels.
The diphthongs of Western Subanon are , , , , , and .
Western Subanon has a typical Philippine-type voice system. Unlike most other Philippine languages, it only has three voice categories.
The chorus of the Western Subanon song "" 'Let's plant' is shown.