Trivia: Who was the oldest individual ever to serve in the Senate?
John Dingell
Daniel Inouye
Chuck Grassley
Strom Thurmond
The correct answer is Strom Thurmond
So why is this answer correct? : Senator Strom Thurmond of South Carolina was the oldest person to serve in Congress, turning 100 years old just one month before his retirement in January 2003. On the flip side, John H. Eaton, a senator from Tennessee, became the youngest U.S. Senator after being sworn in at just 28 years and 5 months old in 1818.