Kota Semarahan is surrounded by several tributaries such as Batang (a river in Malay Language) Semarahan, Sg. Tuang, Sg. Meranek. Kg Meranek is one of the earlier settlement within the Kota Semarahan Area. Desa Ilmu is the latest modern settlement located within the area.
Location map of Kota Semarahan which is located about 45 km from Kuching (Sarawak Capital City). Kota Semarahan is developed at a very fast rate with several new townships cropping up along the major road leading to Kuching.