Batu Satu, also known as Kampong Parit, is an area in Bandar Seri Begawan, the capital of Brunei. It is also a designated village in Brunei-Muara District, within Mukim Kianggeh. The population was 1,509 in 2016. It encompasses a commercial area of the capital. It is also home to the country's Supreme Court, as well as some of important Islamic religious educational institutions of the country.