| Election Name: | 2015 Kuomintang chairmanship by-election |
| Flag Image: | Naval Jack of the Republic of China.svg |
| Type: | by-election |
| Ongoing: | no |
| Previous Election: | 2013 Kuomintang chairmanship election |
| Previous Year: | 2013 |
| Next Election: | 2016 Kuomintang chairmanship by-election |
| Next Year: | 2016 |
| Election Date: | 17 January 2015 |
| Turnout: | 56.34% |
| Image1: | VOA chinese KMT candidate Eric Chu 13May10 300.jpg |
| Nominee1: | Eric Chu |
| Color1: | 000099 |
| Popular Vote1: | 196,065 |
| Percentage1: | 100% |
| Chairman | |
| Before Election: | Wu Den-yih (acting) |
| After Election: | Eric Chu |
The 2015 Kuomintang chairmanship by-election was held on 17 January 2015 in Taiwan. This was the sixth direct election of the chairman in the Kuomintang history. All registered, due-paying KMT party members were eligible to vote.
The election was called after Ma Ying-jeou resigned from the Kuomintang chairmanship to take responsibility for the party's heavy losses during the local elections held on 29 November 2014.[1] Six KMT members, among them Clara Chou and Lee Hsin, attempted to register for the election, but five were rejected.[2] Eric Chu, who had just been reelected Mayor of New Taipei in the November elections,[3] was the only officially confirmed candidate.[4]
Chu garnered 99.61% of all votes,[5] beating the previous record in 2001.