Samarahan Division is one of the twelve administrative divisions in Sarawak, Malaysia. Formerly part of the First Division, which included Kuching, it became a separate Division on 24 July 1986, with a total area of 4,967.4 square kilometres.

Samarahan
Divisions of Sarawak
Division Office location	Kota Samarahan
Local area government(s)	Majlis Perbandaran Kota Samarahan (MPKS) (Samarahan Gedong Sebuyau and Asajaya) Majlis Daerah Simunjan (MDS)
Area
• Total	4,967.4 km2 (1,917.9 sq mi)
Population  (2010[1])
• Total	246,782
• Density	50/km2 (130/sq mi)
Resident	Tuan Hj Brahim bin Lumpu
License plate prefix	QC
Demographics	56% Malay,30% Iban ,15% Chinese,1%Bidayuh,1% Melanau, 1% Orang Ulu,0.5% Eurasian, 0.5% Indian ,1% Non Citizen

Samarahan Division formerly contained five administrative districts: Samarahan, Asajaya, Serian,Gedong, Sebuyau and Simunjan. The total population was 246,782 (year 2010 census). but on 11 April 2015 the Serian District was separated to form a new Division. The population is Majority of Malay almost 66% and follow by Iban, Chinese , Bidayuh, Melanau, Orang Ulu, Eurasian and Indian.

On 11 November 2016, the status of Majlis Daerah Samarahan has been upgraded to Majlis Perbandaran Kota Samarahan, giving Kota Samarahan, the capital of Samarahan division from small town to town. The declaration took place in Kota Samarahan by the then Premier of Sarawak, Pehin Sri (Dr.) Haji Adenan bin Haji Satem. He was represented by his deputy, Deputy Premier, Tan Sri Datuk Amar James Jemut Masing.