Dianne Feinstein, the oldest sitting senator, turns 88 [on June 22, 2021]. She’s served since 1992. Charles Grassley, three months younger, celebrates his 88th birthday in September [of 2021]. He’s held the job for 40 years.
Richard Shelby is 87. James Inhofe is 86. Pat Leahy is 81. The three men have served in the senate for a total of 106 years.
And there are plenty more right behind them: Twenty-three members of the Senate are in their 70s; only one is under 40. According to the Congressional Research Service, the average age of senators at the beginning of this year was 64.3 years — the oldest in history.