| Gust L. Stemmler | |
| State House: | Pennsylvania |
| District: | 55th |
| Term Start: | 1969 |
| Term End: | 1972 |
| Predecessor: | District created |
| Successor: | Joseph Petrarca, Sr. |
| State House2: | Pennsylvania |
| District2: | Westmoreland County |
| Term Start2: | 1963 |
| Term End2: | 1968 |
| Birth Date: | December 10, 1899 |
| Death Date: | November 7, 1986 (aged 86) |
| Party: | Democratic |
Gust L. Stemmler (December 10, 1899 – November 7, 1986)[1] is a former Democratic member of the Pennsylvania House of Representatives.[2] He served as a representative from 1963 to 1972.[3]