How Old Are U.S. Democratic Senators in 2025?

The New Diplomat
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  • Two-thirds of U.S. Senators are over the age of 60, with Democrats averaging 63.7 years old.
  • Senator Jon Ossoff (38) is the youngest Democrat, while Richard Durbin (80) is the oldest.

The U.S. Senate is one of the oldest legislative bodies in the world, with a majority of lawmakers well into their 60s and 70s. In 2025, the chamber remains dominated by Baby Boomers, though a handful of younger senators represent a generational shift.

This infographic breaks down the ages of Democratic senators. The data for this visualization comes from the Biographical Directory of the United States Congress.

A Senate Dominated by Boomers

Baby Boomers remain the backbone of the Democratic caucus. Nearly two-thirds of Democratic senators fall within this generation, many now in their 60s and 70s.

Senate Majority Leader Chuck Schumer (74), Elizabeth Warren (76), and Ed Markey (79) are just a few examples of the party’s senior leadership.

Senator’s Name State Class Age Generation
Ossoff, Jon Georgia II 38 Millennial
Kim, Andy New Jersey I 43 Millennial
Gallego, Ruben Arizona I 45 Gen X
Slotkin, Elissa Michigan I 49 Gen X
Padilla, Alex California III 52 Gen X
Murphy, Christopher Connecticut I 52 Gen X
Schatz, Brian Hawaii III 52 Gen X
Heinrich, Martin New Mexico I 53 Gen X
Luján, Ben Ray New Mexico II 53 Gen X
Alsobrooks, Angela D. Maryland I 54 Gen X
Warnock, Raphael G. Georgia III 56 Gen X
Booker, Cory A. New Jersey II 56 Gen X
Fetterman, John Pennsylvania III 56 Gen X
Duckworth, Tammy Illinois III 57 Gen X
Gillibrand, Kirsten E. New York I 58 Gen X
Bennet, Michael F. Colorado III 60 Gen X
Kelly, Mark Arizona III 61 Baby Boomer
Durbin, Richard J. Illinois II 80 Silent Generation
The Younger Democrats

While the average Democratic senator is 63.7 years old, younger lawmakers make up a small minority. Only two senators, or 4.4%, are Millennials: Jon Ossoff (38) of Georgia and Andy Kim (43) of New Jersey. Both are relative newcomers, with Ossoff making history as Georgia’s first millennial senator and Kim as New Jersey’s first Asian American senator.

Gen X in the Middle

Generation X makes up about 31% of Senate Democrats, sitting squarely between Boomers and Millennials. This cohort includes Elissa Slotkin (49, Michigan), the state’s first female senator and a former CIA analyst and Pentagon official, along with Tammy Duckworth (57, Illinois), an Iraq War veteran and advocate for veterans’ affairs.

Class Divides and Election Cycles

Senators are grouped into three classes that determine when they face re-election.

Class I → Last elected 2024 — Next election: 2030
Class II → Last elected 2020 — Next election: 2026
Class III → Last elected 2022 — Next election: 2028

Many younger Democrats—such as Andy Kim and Elissa Slotkin—are in Class I, with their first full terms stretching into 2030. Meanwhile, veteran lawmakers in Class II, including Richard Durbin (80), face voters in 2026.

Credit: Visual Capitalist

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