2015 Taiwanese legislative by-elections

The 2015 Taiwanese legislative by-elections were held on 7 February 2015 in Taiwan to elect 5 of the 113 members of the Legislative Yuan for the remaining term until 2016. No change in the party composition of the Legislative Yuan resulted from the by-elections; three Democratic Progressive Party candidates won the seats vacated by DPP legislators, and two Kuomintang candidates won the seats vacated by KMT legislators.

Background
The by-election was the result of resignations by Kuomintang legislator Hsu Yao-chang from Miaoli County's 2nd district; Lin Chia-lung, Democratic Progressive Party legislator for Taichung City's 6th district; Wei Ming-ku, Democratic Progressive Party legislator for Changhua County's 4th district; Lin Ming-chen, Kuomintang legislator for Nantou County's 2nd district; and Pan Men-an, Democratic Progressive Party legislator for Pingtung County's 3rd district.

Hsu Yao-chang, Wei Ming-ku, Lin Ming-chen, and Pan Men-an won their elections for county magistrate, and Lin Chia-lung won his election for mayor in the 2014 local election. Under the Article 73 of the Civil Servants Election and Recall Act, if any positions become vacant due to resignation or election to another office, and the vacated term is longer than one year, a by-election shall be completed within three months commencing from the date of resignation.

On 5 December 2014, the Central Election Commission announced that by-elections for Taichung 6 and Changhua 4 were to be held on 7 February 2015. Candidate registrations for the two seats were open from 22 to 26 December 2014. On 26 December 2014, the CEC announced that the by-elections for Miaoli 2, Nantou 2, and Pingtung 3 were to be held on 7 February 2015 as well. Candidate registrations for these three seats were open from 26 December 2014 to 9 January 2015.

Miaoli 2
By-election for Miaoli 2 constituency took place on 7 February 2015. Kuomintang called in head of Gongguan Township Hsu Chih-jung to contest the seat. Democratic Progressive Party called in legislator Wu Yi-chen to contest the seat. The DPP originally supported Sunflower Student Movement activist Chen Wei-ting's bid, but Chen dropped out after allegations of sexual harassment against him surfaced online.

Taichung 6
By-election for Taichung 6 constituency took place on 7 February 2015. KMT called in Deputy Secretary-General of the Executive Yuan Hsiao Chia-chi to contest the seat. DPP called in Taichung City councillor Huang Kuo-shu to contest the seat.

Changhua 4
By-election for Changhua 4 constituency took place on 7 February 2015. KMT called in former Changhua County magistrate Cho Po-yuan to contest the seat. DPP called in Changhua County councillor Chen Su-yueh to contest the seat. Former Changhua County councillor Hung Li-na announced her bid as an independent after leaving the KMT.

Nantou 2
By-election for Nantou 2 constituency took place on 7 February 2015. KMT called in Nantou City mayor Hsu Shu-hua to contest the seat. DPP called in former legislator Tang Huo-shen to contest the seat. Former legislator Chen Cheng-sheng of the People First Party had previously announced his intention to run, but Chen dropped out and supported Tang as the opposition candidate. Assistant professor Shih Chin-fang announced his bid as an independent after leaving the KMT.

Pingtung 3
By-election for Pingtung 3 constituency took place on 7 February 2015. KMT's nomination shortlist included legislator Su Ching-chuan, former legislator Liao Wan-ju (politician), and Director-General of the Pingtung County Farmer Association Huang Jui-chi. The KMT ultimately called in Liao to contest the seat. DPP called in former Taipei City councillor Liao Wan-ju to contest the seat. Former Executive Yuan advisor Huang Chao-chan had also expressed interest in running, but the DPP nominated Liao after comparing results from hypothetical head-to-head polling.