| Robert K. Hamilton | |
| Speaker: | 76th |
| State House: | Pennsylvania |
| Term Start2: | January 5, 1965 |
| Term End2: | November 10, 1986 |
| Predecessor2: | Stuart Helm |
| Successor2: | Kenneth Lee |
| State House3: | Pennsylvania |
| District3: | 16th |
| Term Start3: | January 7, 1969 |
| Term End3: | November 30, 1972 |
| Predecessor3: | District created |
| Successor3: | Charles Laughlin |
| State House4: | Pennsylvania |
| District4: | Beaver County |
| Term Start4: | January 4, 1949 |
| Term End4: | November 30, 1968 |
| Term Start5: | January 7, 1941 |
| Term End5: | November 30, 1946 |
| Birth Date: | 3 September 1905 |
| Birth Place: | Roswell, New Mexico |
| Residence: | Ambridge, Pennsylvania |
| Death Place: | Ambridge, Pennsylvania |
| Party: | Democrat |
Robert K. Hamilton (September 3, 1905 – November 10, 1986) was a Speaker of the Pennsylvania House of Representatives.
Hamilton was first elected to the Pennsylvania House of Representatives in 1941 and served through 1946. He served another nonconsecutive tenure from 1949 until 1972 https://web.archive.org/web/20060808211748/http://www.legis.state.pa.us/WU01/VC/visitor_info/gallery/SpeakersPortraits.pdf.
Hamilton was Ambridge, Beaver County, Pennsylvaniahttps://web.archive.org/web/20060808211748/http://www.legis.state.pa.us/WU01/VC/visitor_info/gallery/SpeakersPortraits.pdf.