| John Bailhache | |
| Office1: | Member of the Illinois House of Representatives from Madison County |
| Term Start1: | 1842 |
| Term End1: | 1843 |
| Office2: | 10th Mayor of Columbus |
| Term Start2: | 1835 |
| Term End2: | 1835 |
| Predecessor2: | John Brooks |
| Successor2: | Warren Jenkins |
| Office3: | Member of the Ohio House of Representatives from Ross County |
| Term Start3: | 1820 |
| Term End3: | 1820 |
| Party: | Whig |
| Profession: | Mayor Newspaper editor State legislator Judge |
| Birth Date: | May 8, 1787 |
| Birth Place: | Saint Ouen, Isle of Jersey |
| Death Date: | September 3, 1857 (aged 70) |
| Death Place: | Alton, Illinois, US |
| Spouse: | Mary Elizabeth Heath |
| Children: | William Preston Arthur |
John Bailhache (May 8, 1787 – September 3, 1857) was the 10th mayor of Columbus, Ohio. The Columbus City Council appointed him to complete the remaining two-year term of John Brooks after he resigned his office on April 21, 1835. His successor after 1836 was Warren Jenkins.