| Charles M. Poston Sr. | |
| Office: | Louisiana State Senator from Beauregard, Sabine, and Vernon parishes |
| Term Start: | 1960 |
| Term End: | 1964 |
| Preceded: | Frank Estes Cole |
| Succeeded: | Bryan Anthony Poston,Sr. |
| Birth Date: | 14 February 1898 |
| Death Date: | November 1968 (aged 70) |
| Residence: | Hornbeck, Vernon Parish, Louisiana, US |
| Party: | Democratic |
| Occupation: | Railroad employee |
Charles M. Poston Sr. (February 14, 1898 – November 1968),[1] was a Louisiana railroad employee who served in the Louisiana State Senate from 1960 to 1964[2]