The 10 longest-serving senators currently in office
The U.S. Senate is seeing an increase in the average age of its members, with no term limits allowing for decades of service. The article highlights the longest-serving current senators and notes that some are facing reelection in the 2026 midterms.
Why it matters
The aging of legislative bodies raises ongoing discussions about political representation, term limits, and the influence of long-tenured incumbents.
From left to right: Sen. Chuck Grassley, Sen. Susan Collins, and Sen. Mitch McConnell. Finn Gomez/Getty Images ; Charly Triballeau/AFP via Getty Images ; Pete Kiehart/Bloomberg via Getty Images There are no term limits for Senate members, and some have served for decades. Sen. Susan Collins, 73, is running for her sixth Senate term in a high-profile race in the midterms. Sen. Chuck Grassley, 93, is the longest-serving current senator with 45 years in the Senate. Unlike the White House , where US presidents can serve only two terms, members of Congress have no term limits. In the US Senate, some members have served for decades. Senators are also getting older, on average. In the 119th Congress, which began in 2025, the median age of US senators was 64.
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