Bidayuh is the collective name for several indigenous groups found in southern Sarawak, Malaysia and northern West Kalimantan, Indonesia, on the island of Borneo, which are broadly similar in language and culture (see also issues below).

[3] They constitute one of the main indigenous groups in Sarawak and West Kalimantan and live in towns and villages around Kuching and Serian in the Malaysian state of Sarawak, while in the Indonesian province of West Kalimantan they are mainly concentrated in the northern Sanggau Regency.

Most Bidayuh villages can be found in the rural areas of Padawan, Lundu, Penrissen Bau and Serian.

The area continues up to the adjacent West Kalimantan border, where they reside in Kembayan, Noyan, Sekayam, and Jangkang district in Sanggau Regency.

The area in which they live is mainly in the basin of the Sarawak River and hilly to a mountainous forest, traditionally worked by rotational agriculture and hunting based around farms populated from parent villages situated on the hills for protection.

Today, almost all the traditional longhouse villages have been replaced by individual houses, by roads and there are some plantation agriculture and a reduced emphasis on the growing of hill padi.

[4] In Sarawak, there are generally said to be three main linguistic groupings (Biatah, Singai-Jagoi, and Bukar–Sadong), but these can be broken down even beyond the list referenced below as most people can be distinguished by locals down to village level through smaller differences in vocabulary and intonation.

Also included are two Philippine languages, Kapampangan and Tagalog: Bidayuhs are traditionally animist or pagans, and vestiges of these beliefs remain.