It borders Sebuyau and Samarahan and lies approximately 51.4 kilometres (32 mi) east-south-east of the state capital Kuching.

Based on this folklore, a Chinese merchant came to Simunjan on a boat known as Wangkang (Djong (ship)) to rest.

Because this area was still unnamed, people combined "Semun" and "Hujan" to refer this place, hence "Simunjan.

Burung Munjan was to believe a bird native to Simunjan that was abundant within Gunung Ngeli forest.

A statue of Burung Munjan was erected around 1990 at Padang Sentral (Central Park) before being moved to Majlis Daerah Simunjan.