Somkiat Pongpaiboon (Thai script: สมเกียรติ พงษ์ไพบูลย์; 12 January 1950 – 14 November 2021) was a Thai Professor at , Nakhon Ratchasima Province, Thailand. He became a member of the Thai House of Representatives in 2007 from Democrat Party and a leader of the People's Alliance for Democracy, and the co-founder of the Mass Party. Somkiat was an advocate for the poor and a major critic of Prime Minister Thaksin Shinawatra.