Wu Chih-yang (; born 8 February 1969), also known by his English name John Wu, is a Taiwanese lawyer and politician. He was the Magistrate of Taoyuan County from 2009 to 2014. Wu was the former Chinese Professional Baseball League (CPBL) commissioner.
Wu was born in Zhongli District, Taoyuan, on February 8, 1969. His father is politician Wu Po-hsiung.
After high school, Wu attended law school at National Taiwan University and graduated with a Bachelor of Laws (LL.B.) specializing in judicial administration and a Master of Laws (LL.M.) specializing in jurisprudence in 1996. He then pursued graduate studies in the United States at Harvard University, where he earned a second LL.M. degree from Harvard Law School in 1997 under law professor William P. Alford.
Wu was elected Magistrate of Taoyuan County on 5 December 2009 defeating Cheng Wen-tsan in the 2009 magisterial election as a Kuomintang candidate. He assumed the office on 20 December 2009.
In July 2014, it was announced that Taoyuan County would be renamed Taoyuan and reclassified as a special municipality by the end of the year. The county-administered city, known officially as Taoyuan City, was to be renamed Taoyuan District.
Shortly before the reclassification of Taoyuan County as a special municipality, Wu ran for the Taoyuan mayoralty in the 2014 Taiwanese local elections, again facing Cheng Wen-tsan, and lost.
Wu became the commissioner of Taiwan's Chinese Professional Baseball League in 2015, and was reelected in 2017 with unanimous support. During Wu's term, he further expanded CPBL from four teams to five teams, with the addition of Wei Chuan Dragons. As Wu's term ended, Tsai Chi-chang became Wu's successor as CPBL commissioner in January 2021.
Wu is married to Hung Hsiu-hua.