The 10 longest-serving senators currently in office

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.

That marks an increase from the 113th Congress in 2013, when the median age in the Senate was 61, per Ballotpedia.

Of the 10 longest-serving senators, two are running for reelection in the 2026 midterm elections.

Here are the current senators who have held office the longest — and how many years they’ve served.