Wu Nai-ren (; born 18 December 1947) is a Taiwanese politician. He is the former Secretary-General of the Democratic Progressive Party. When Cho Jung-tai declared his intention to run for the party chairmanship in December 2018, Wu withdrew from the party to protest Cho's candidacy.
Wu graduated from Tunghai University with a bachelor's degree in economics and did graduate studies in economics at National Chengchi University. He then earned a Master of Public Administration (M.P.A.) from Harvard University at the Harvard Kennedy School.