Orville Hitchcock Platt was a United States senator from Connecticut. Platt was a prominent conservative Republican and by the 1890s he became one of the "big four" key Republicans who largely controlled the major decisions of the Senate, along with William B. Allison of Iowa, John Coit Spooner of Wisconsin and Nelson W. Aldrich of Rhode Island.
- Occupation
- politician, lawyer, prosecutor
- Position held
- United States senator, United States senator, United States senator, United States senator
- Citizenship
- United States
- Born
- July 19, 1827
- Died