Datuk Liwan Lagang is a Malaysian politician from the Parti Rakyat Sarawak (PRS), a component party of the ruling Gabungan Parti Sarawak (GPS) coalition who has served as the State Deputy Minister of Telecommunication of Sarawak in charge of Telecommunication in the GPS state administration under Premier Abang Abdul Rahman Johari Abang Openg and State Minister Julaihi Narawi since January 2022 and Member of the Sarawak State Legislative Assembly (MLA) for Belaga since May 2006.

[2][3] Between 2016 and 2017, Liwan was appointed as an assistant minister in charge of river transportation and safety.

[5] On 22 August 2019, Chief Minister Abang Johari once again reshuffled his cabinet, with Lagang transferred to the Ministry of Utilities handling the rural electricity portfolio.

[6] He is one of the two assistant ministers to Dr. Stephen Rundi Utom at the ministry, alongside his successor to the water supplies portfolio, Dr. Abdul Rahman Junaidi.

On 30 December 2021, Chief Minister Abang Johari unveiled his new Cabinet lineup.