| Jacob F. Gmelich | |
| Native Name: | instead.--> |
| Order: | 27th |
| Office: | Lieutenant Governor of Missouri |
| Term Start: | 1909 |
| Term End: | 1913 |
| Successor: | William R. Painter |
Jacob F. Gmelich (July 23, 1839 – February 21, 1914) was an American politician. He served as the State Treasurer of Missouri from 1905 to 1909.[1] and the 27th Lieutenant Governor of Missouri from 1909 to 1913 serving under Governor Herbert S. Hadley.