Semenyih is a town and a mukim in Hulu Langat District in southeastern Selangor, Malaysia along the Kajang–Seremban road. It is 28 km southeast of downtown Kuala Lumpur and 8 km southeast of Kajang. The meaning of the name of the town is uncertain and it does not appear in any dictionary. It was derived from the locals and is related to its past. According to an oral story, it is based from a word in the Negeri Sembilan dialect, meaning "hidden" – the standard Malay word for "hidden" is sembunyi.