This is a list of major by-elections in Taiwan, with the names of the incumbent and victor and their respective parties.
| Party | Cause | ||||||
|---|---|---|---|---|---|---|---|
| Kaohsiung | 15 August 2020 | Han Kuo-yu | Chen Chi-mai | Recalled | |||
| Keelung | 19 February 2007 | Hsu Tsai-li | Chang Tong-rong | Death | |||
| Taitung County | 1 April 2006 | Wu Chun-li | Kuang Li-chen | Resigned over corruption | |||
| Yunlin County | 6 November 1999 | Su Wen-hsiung | Chang Jung-wei | Death | |||
| Taoyuan County | 15 March 1997 | Liu Pang-yu | Annette Lu | Assassinated | |||
| Penghu | 8 March 1993 | Wang Chien-tung | Kao Chih-peng | Death | |||
| Hsinchu | 23 June 1984 | Shih Hsing-chung | Shih Hsing-chung | Resigned | |||
| Taichung County | 16 April 1956 | Chen Shui-tan | Liao Wu-hu | Death | |||
| Taitung County | 1 March 1952 | Chen Chen-tsung | Wu Chin-yu | Death | |||
| Miaoli County | 29 July 1951 | Liu Ting-kuo | Lai Shun-sheng | Election annulled after unduly elected |
| Party | Cause | ||||||
|---|---|---|---|---|---|---|---|
| Nantou II | 4 March 2023 | Hsu Shu-hua | Frida Tsai | Elected as Magistrate of Nantou County | |||
| Taipei III | 8 January 2023 | Chiang Wan-an | Wang Hung-wei | Resigned to run in election | |||
| Taichung II | 9 January 2022 | Chen Po-wei | Lin Ching-yi | Recalled | |||
| Changhua I | 16 March 2019 | Wang Huei-mei | Ko Cheng-fang | Elected as Magistrate of Changhua County | |||
| New Taipei III | 16 March 2019 | Gao Jyh-peng | Yu Tian | Disqualified after conviction | |||
| Kinmen | 16 March 2019 | Yang Cheng-wu | Chen Yu-chen | Elected as Magistrate of Kinmen County | |||
| Tainan II | 16 March 2019 | Huang Wei-che | Kuo Kuo-wen | Elected as Mayor of Tainan | |||
| Taichung V | 27 January 2019 | Lu Shiow-yen | Shen Chih-hwei | Resigned to run in election | |||
| Taipei II | 27 January 2019 | Pasuya Yao | Ho Chih-wei | Resigned to run in election | |||
| Changhua IV | 7 February 2015 | Wei Ming-ku | Chen Su-yueh | Resigned to run in election | |||
| Miaoli II | 7 February 2015 | Hsu Yao-chang | Hsu Chih-jung | Elected as Magistrate of Miaoli County | |||
| Nantou II | 7 February 2015 | Lin Ming-chen | Hsu Shu-hua | Elected as Magistrate of Nantou County | |||
| Pingtung III | 7 February 2015 | Pan Men-an | Chuang Jui-hsiung | Elected as Magistrate of Pingtung County | |||
| Taichung VI | 7 February 2015 | Lin Chia-lung | Huang Kuo-shu | Resigned to run in election | |||
| Taichung II | 26 January 2013 | Yen Ching-piao | Yen Kuan-heng | Disqualified after conviction | |||
| Kaohsiung IV | 5 March 2011 | Chen Chi-yu | Lin Tai-hua | Became Deputy Mayor of Kaohsiung | |||
| Tainan IV | 5 March 2011 | Lai Ching-te | Hsu Tain-tsair | Elected as Mayor of Tainan | |||
| Chiayi County II | 27 February 2010 | Helen Chang | Chen Ming-wen | Resigned to run in election | |||
| Hsinchu County | 27 February 2010 | Chiu Ching-chun | Perng Shaw-jiin | Elected as Magistrate of Hsinchu County | |||
| Hualien County | 27 February 2010 | Fu Kun-chi | /PFP | Wang Ting-son | Elected as Magistrate of Hualien County | ||
| Taoyuan III | 27 February 2010 | John Wu | Huang Jen-shu | Elected as Magistrate of Taoyuan County | |||
| Taichung County III | 9 January 2010 | Chiang Lien-fu | Tony Jian | Election annulled over fraud | |||
| Taitung County | 9 January 2010 | Justin Huang | Lie Kuen-cheng | Resigned to run in election | |||
| Taoyuan II | 9 January 2010 | Liao Cheng-ching | Kuo June-tsung | Election annulled over fraud | |||
| Nantou I | 5 December 2009 | Wu Den-yih | Ma Wen-chun | Became Premier of the Republic of China | |||
| Yunlin II | 26 September 2009 | Chang Sho-wen | Liu Chien-kuo | Election annulled over fraud | |||
| Taipei VI | 28 March 2009 | Diane Lee | Chiang Nai-shin | Resigned over dual citizenship | |||
| Miaoli I | 14 March 2009 | Lee Yi-ting | Kang Shih-ju | Election annulled over fraud | |||
| Chiayi | 11 March 2006 | Huang Min-hui | Chiang Yi-hsiung | Elected as Mayor of Chiayi | |||
| Hualien County | 12 March 1995 | Hsieh Shen-shan | Chang Wea | Became Minister of Council of Labor Affairs of the Republic of China |