| G. Sieber Pancoast | |
| State House: | Pennsylvania |
| District: | 147th |
| Term Start: | January 7, 1969 |
| Term End: | November 30, 1978 |
| Predecessor: | District Created |
| Successor: | Marilyn Lewis |
| State House2: | Pennsylvania |
| District2: | Montgomery County |
| Term Start2: | January 5, 1965 |
| Term End2: | November 30, 1968 |
| Birth Date: | June 16, 1914 |
| Birth Place: | Audubon, New Jersey[1] |
| Death Place: | Collegeville, Pennsylvania |
| Party: | Republican |
| Spouse: | Mimi Pancoast |
| Children: | Linda, Suzie |
Garfield Sieber Pancoast (June 16, 1914 – March 18, 1992) was an American politician. He was a Republican member of the Pennsylvania House of Representatives.[2]