| Frank Edward Guernsey | |
| Image Name: | Frank E. Guernsey.jpg |
| Birth Date: | October 15, 1866 |
| Death Date: | January 1, 1927 (aged 60) |
| Resting Place: | Dover Cemetery, Dover-Foxcroft, Maine |
| State: | Maine |
| District: | 4th |
| Term Start: | November 3, 1908 |
| Term End: | March 3, 1917 |
| Term Start2: | 1903 |
| Term End2: | 1903 |
| Office3: | Member of the Maine House of Representatives |
| Term Start3: | 1897 |
| Term End3: | 1899 |
| Office4: | Treasurer of Piscataquis County, Maine |
| Term Start4: | 1890 |
| Term End4: | December 31, 1896 |
| Alma Mater: | Eastman's College, Poughkeepsie, New York |
| Party: | Republican |
| Spouse: | Josephine Frances Lyford, m. June 16, 1887 |
| Children: | Thompson L. Guernsey, born, February 17, 1904. |
Frank Edward Guernsey (October 15, 1866 – January 1, 1927) was a U.S. Representative from Maine.
Guernsey the son of Edward Hersey Guernsey and Hannah (Thompson) Guernsey was born in Dover, Maine on October 15, 1866.
Guernsey attended the common schools, Foxcroft Academy, East Maine Conference Seminary, Bucksport, Maine, Wesleyan Seminary, Kents Hill, Maine, and Eastman's College, Poughkeepsie, New York.
Guernsey married Josephine Frances Lyford on June 16, 1887, in Vinal Haven, Maine. They had a son Thompson L. Guernsey, who was born at Dover on February 17, 1904.
Guernsey studied law in the office of Honorable Willis E. Parsons, of Foxcroft, Maine, he was admitted to the bar in September, 1890 and commenced practice in Dover, Maine.
Guernsey was elected treasurer of Piscataquis County, Maine in In September, 1890, and he was re-elected twice, serving in this office until December 31, 1896.
Guernsey served as member of the Maine House of Representatives from 1897 to 1899. He served in the Maine Senate in 1903.
Guernsey was elected as a Republican to the Sixtieth Congress to fill the vacancy caused by the death of Llewellyn Powers.Guernsey was reelected to the Sixty-first and to the three succeeding Congresses and served from November 3, 1908, to March 3, 1917.He did not run for reelection but was an unsuccessful candidate for the Republican nomination for Senator.
Guernsey served as delegate to the Republican National Convention in 1908.
In 1905 Guernsey was elected as the president of the Piscataquis Savings Bank. He was also a trustee of the University of Maine.
Guernsey died in Boston, Massachusetts, January 1, 1927. He was interred in Dover Cemetery, Dover-Foxcroft, Maine.