STKRJ Katok 'B' or Kampong Katok 'B', also known as STKRJ Mata-Mata, is a public housing estate in Brunei-Muara District, Brunei, about 11 kilometres (6.8 mi) from the country's capital Bandar Seri Begawan.

[a] It is one of the estates for the Landless Indigenous Citizens' Housing Scheme (Skim Tanah Kurnia Rakyat Jati, STKRJ), a public housing programme for the country's indigenous citizens (rakyat jati).

The estate is located in the central part of Brunei-Muara District, as well as in the outskirts of the municipal area of Bandar Seri Begawan and about 11 kilometres (6.8 mi) from the capital's city centre.

For subdivision purposes, the estate is officially known as STKRJ Mata-Mata and has been divided into three areas and administered as villages: Katok 'B' Primary School is the estate's government primary school.

Other schools located in the area include: However, their location address is often attributed to Kampong Katok, even though they are located outside of the village boundary.