Selangau, Sarawak, (Malay: Pekan Selangau) is a small town located by the Pan Borneo Highway (Sibu-Bintulu Road). It is also located by Batang Mukah, a river which flows to the South China Sea. It is located approximately 74 km (46 mi) from Sibu city, 84 km (52 mi) from Mukah town and 134 km (83 mi) from Bintulu town. Selangau town is the administrative centre for the Selangau District.

The name "Selangau" comes from the name of a river, which is one of the tributaries of the Mukah river.

The earliest settlement of Selangau town was near the Selangau river delta (near Nanga Selangau primary school today). Initially, the area was inhabited by the Beketan people before they were displaced by the Iban people from Kanowit and Lemanak river. The Beketan people then moved to Tatau District. Meanwhile, the Iban people inhabited the Selangau delta in the 1930s and 1940s. There were only four shophouses owned by Chinese and Iban people selling groceries at that time.

In the 1960s, after the completion of Pan Borneo Highway between Sibu and Bintulu, these residents then moved their homes to the present location beside the highway. Selangau was originally put under the administration of Mukah district. However, with the increasing number of traders coming to town, has raised the population of the town. In the 1970s, a representative was chosen to administer the town and act as an intermediary between the government and the people. Selangau also become a resting station for the people who ply the highway regularly.

In the 1980s, a great fire burnt down the wooden houses in the town of Selangau. After that concrete houses were built to replace the wooden houses.

Due to the rising population and the development of Selangau, it was declared as a new district on 1 March 2002 with the Selangau town acted as the administrative centre. The Selangau district is now put under the administration of Sibu Division.

Sibu Rural District Council (SRDC) administers the Selangau town and district.

Selangau town is located at an intersection approximately 74 km from Sibu town, 84 km from Mukah town and 134 km from Bintulu town.

Selangau has a tropical rainforest climate (Af) with heavy to very heavy rainfall year-round.

The population (2010) of the district is 24,412.

Selangau traders serve commuters along the Sibu-Bintulu trunk road on Pan Borneo Highway and workers from surrounding oil palm plantations with daily necessities.

Route No.	Operating Route	Operator	Remark
16	Sibu Mukah	Lanang Bus, Rejang Bus

This section needs expansion. You can help by adding to it. (September 2018)

Selangau is the major stopover station for bus express. Selangau have accessibility of sea and land transportation via cars, trucks, bus and boats. Currently, it was accessed mainly on road as it used many times. Selangau included in Pan Borneo Highway project (WPC 08; Sg. Kua Bridge to Sg. Arip Bridge) and was managed by Lebuhraya Borneo Utara Sdn Bhd (LBU) as a turnkey contractor. The main purpose of this project is replacing the existing two-lane carriageway at the old road to new four-lane two-way carriageway, including a few new lanes and constructing of an interchange at Mukah junction and new bridges, including new Batang Mukah Bridge. The main contractor of this project is Musyati Mudajaya JV (MMJV) Sdn Bhd.

• SK Ulu Sungai Arip
• SK Sungai Tau
• SK Sungai Sepiring
• SK Sungai Pakoh
• SK Sungai Kemena
• SK Sungai Buloh
• SK Sungai Bawang
• SK Sungai Arau
• SK Sungai Anak
• SK St Matthew Sekuau (M)
• SK St Mark (M)
• SK Penghulu Imban
• SK Nanga Tajam
• SK Nanga Selangau
• SK Nanga Kua
• SK Kuala Pelugau
• SK Kuala Lemai
• SK Iban Union
• SK Bukit Arip
• SK Batu 36
• SK Dijih Selangau
• SJK(C) Tong Ah

• SMK Ulu Balingian

The town is served by a health clinic, Selangau Health Clinic operated by the Ministry of Health.

The Selangau Fire Department Station was built, serving the emergency services, such as drowning and fire. It was managed by Fire and Rescue Department and Ministry of Housing and Local Government. With its existing, it will reducing response time from Sibu Fire Station and Mukah Fire Station.

There is a weekend bazaar at Selangau where natives could sell their jungle produce to their customers. Pesta Selangau (Selangau Festival) is held every year. Among the activities during the festival are: rafting, kayaking, and radio-controlled boat race.

The federal constituency represented in the Dewan Rakyat is Selangau (federal constituency).

• Laman Web Rasmi Pejabat Daerah Selangau