Niwatthamrong Boonsongpaisan (Thai: นิวัฒน์ธำรง บุญทรงไพศาล, RTGS: Niwatthamrong Bunsongphaisan, pronounced [ní.wát.tʰam.roŋ bun.soŋ.pʰaj.sǎːn] ⓘ; born 25 January 1948) is a Thai businessman and politician who served as the acting Prime Minister of Thailand following Yingluck Shinawatra's removal from office by the Constitutional Court of Thailand on 7 May 2014 until his deposition in a coup d'état three weeks after taking office.

He holds a bachelor's degree in education from Srinakharinwirot University and a master's degree in computer science from Chulalongkorn University and is married to Boonphatcharee Boonsongpaisan.

[1] A close business associate of Thaksin Shinawatra, Niwatthamrong served as the Chairman of the Executive Committee-Media and Advertising front of Shin Corporation since 1995 and as Vice-Chairman since 2000.

[1] Niwatthamrong served as director of the controversial rice pledging scheme, where rice was bought at inflated prices from farmers and subsequently was left to rot due to lack of buyers.

Niwatthamrong has received the following royal decorations in the Honours System of Thailand: