Thomas Jenckes
| Thomas A. Jenckes | |
|---|---|
| Member of the U.S. House of Representatives from Rhode Island's 1st district | |
| In office March 4, 1863 – March 3, 1871 | |
| Preceded by | William Paine Sheffield, Sr. | 
| Succeeded by | Benjamin T. Eames | 
| Member of the Rhode Island House of Representatives | |
| In office 1854–1857 | |
| Personal details | |
| Born | November 2, 1818 Cumberland, Rhode Island | 
| Died | November 4, 1875 (aged 57) Cumberland, Rhode Island | 
| Resting place | Swan Point Cemetery | 
| Political party | Republican | 
| Alma mater | Brown University | 
| Occupation | Lawyer | 
| Signature | |
Thomas Allen Jenckes I (November 2, 1818 – November 4, 1875) was a United States representative from Rhode Island. Jenckes was best known for introducing a bill that created the United States Department of Justice. President Ulysses S. Grant then signed the bill into law on June 22, 1870. Jenckes was also a supporter of civil service reform.