Banyumas or "Banjoemas" is a regency (Indonesian: kabupaten) in the southwestern part of Central Java province in Indonesia. Its capital is Sumpiuh.

The term Banyumasan is also used as an adjective referring to the culture, language and peoples of larger Banyumas area. The language of Banyumasan are of Austronesian origin, and is usually considered to be a dialect of Javanese.