Mentakab ( Chinese: , Tamil: ) is a main town in Pahang, Malaysia, originally known as Pasir Rawa. It is close to Temerloh, Lanchang, Kampung Tualang, Kampung Gantok, Mengkarak and Kerdau. Mentakab was once considered by the State Government in the year 1901 to be the new centre of all administrative works in the state of Pahang. However, due to a problem of uneven land, Kuala Lipis was instead made the capital of the state, later replaced by Kuantan in 1955. Mentakab is located under the district of Temerloh. Temerloh is a large district and contains many towns. Mentakab, being a fairly large town, is often thought by people to be a district in itself, separate from Temerloh.
Mentakab was a federal constituency in Pahang, Malaysia, that was represented in the Dewan Rakyat from 1986 to 2004.
The federal constituency was created in the 1984 redistribution and was mandated to return a single member to the Dewan Rakyat under the first past the post voting system.