| John Caroll Houston IV | |
| Birth Date: | 3 April 1842[1] |
| Birth Place: | Mayport, Florida |
| Death Place: | Houston Street, Eau Gallie, Florida |
| Residence: | Eau Gallie, Florida |
| Restingplace: | Houston Pioneer Cemetery, Eau Gallie, Florida |
| Office: | Mayor of Eau Gallie, Florida |
| Order: | 2nd, 7th, and 15th |
| Term Start: | 1897 |
| Term End: | 1898 |
| Predecessor: | William Roesch |
| Successor: | Albert Burnett |
| Term Start2: | 1902 |
| Term End2: | 1903 |
| Predecessor2: | W.J. Nesbett |
| Successor2: | George Paddison |
| Term Start3: | 1910 |
| Term End3: | 1911 |
| Predecessor3: | George Paddison |
| Successor3: | George Paddison |
| Occupation: | cattle rancher; boat captain for passenger, mail and freight |
| Spouse: | Susan Elizabeth Stewart (m. September 5, 1860) |
| Children: | Clara Houston McMillan, George C., Frank, Bessie, and Annie Laura Houston Braddock |
| Allegiance: | Confederate States of America |
| Unit: | 3rd Florida Infantry |
| Rank: | Captain |
| Battles: | American Indian Wars |
John Caroll Houston IV (April 3, 1842 – February 22, 1918) was one of the first permanent settlers of Eau Gallie, Florida and served as its mayor for three terms in 1897, 1902, and 1910.[1] [2]