Chen Chu (Chinese: 陳菊; pinyin: Chén Jú; Wade–Giles: Ch'en² Chü²; Pe̍h-ōe-jī: Tân Kiok; born 10 June 1950), also known as Kiku Chen or Joyce Chen, is a Taiwanese politician serving as president of the Control Yuan and chairwoman of the National Human Rights Commission since 2020. Before assuming her current post, Chen had served as Secretary-General to the President from 2018 to 2020 and Mayor of Kaohsiung from 2006 to 2018, making her the longest-serving mayor of the city since the Japanese occupation of Taiwan. Prior to her entrance into politics, Chen was one of the eight prominent dissidents in the Kaohsiung Incident arrested and charged in 1979. She was a political prisoner for almost six years during the martial law period in Taiwan.

Chen had also served in various capacities with the Taipei and Kaohsiung city governments between 1995 and 2000, with the latter being the year when she graduated from the National Sun Yat-sen University (NSYSU) with a master's degree in public affairs. She then served as Minister of the Council of Labor Affairs, the precursor to present-day Ministry of Labor, in various cabinets between 2000 and 2005. Chen won the 2006 Kaohsiung mayoral election and became the Republic of China's first directly-elected female mayor of a special municipality. She was twice reelected in 2010 and 2014 with about 53% and 68% of the votes respectively.

Nearly a month after she tendered her resignation from the role of Secretary-General to the President, President Tsai Ing-wen nominated Chen, who supports abolishing altogether the Examination Yuan and Control Yuan, as the next President of the Control Yuan on 22 June 2020 amid dissent from the opposition. Legislative Yuan confirmed the nomination on a 65-3 vote after days of violence in the chamber. Lawmakers from the Kuomintang and the Taiwan People's Party boycotted the vote whereas all New Power Party lawmakers cast their dissent votes.

The Democratic Progressive Party, which Chen helped to found, temporarily suspended her membership during her tenure as President of the Control Yuan according to party rules. Chen had expressed hopes of becoming the last President of the Control Yuan after helping to secure passage of the amendments to the Constitution.

Chu was born on June 10, 1950, in Sanxing. She was the second child in a family of five children. After graduating from Taiwan Provincial Yilan County Toucheng Middle School, she studied library science as an undergraduate at Shih Hsin University and obtained a bachelor's degree in 1968 and a master's degree in social development from the university. In 2001, she earned a Master of Public Affairs (M.P.A.) from National Sun Yat-sen University.

Chen narrowly defeated the Kuomintang candidate Huang Jun-ying with a margin of just 1,120 votes in the 2006 Kaohsiung mayoral election. After announcement of the election result, Huang filed two lawsuits against Chen's campaign team, requesting the court to annul the election. He argued airing of a video, produced by Chen's campaign team, on the eve of the election resulted in his loss. The Kaohsiung District Court ruled in favor of Huang in one of the lawsuits, thus nullifying the election.

Chen expressed her intention to appeal to the court upon knowing the verdict. She claimed it would be a political suicide if she accepted the ruling. While her colleague and Democratic Progressive Party legislator Kuan Bi-ling advised Chen to concede, Chen nonetheless appealed the ruling. There were speculations on whether Kuan, who lost to Chen during the primaries, made the remark out of personal interest.

The High Court eventually overturned the earlier decision of the Kaohsiung District Court and revalidated the election result on 17 November 2007. Chen announced, after all legal proceedings against the mayoral election result had ended, that her policy priorities would be the city's transportation, infrastructure construction and environmental protection.