The 10 longest-serving senators currently in office

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 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. Sen. Maria Cantwell — 25 years Sen. Maria Cantwell. Tom Williams/CQ-Roll Call, Inc via Getty Images Cantwell, a 68-year-old Democrat from Washington, has served as a US senator since January 3, 2001. She won her fifth term in 2024 and will be up for reelection in 2030. Sen. Chuck Schumer — 27 years Sen. Chuck Schumer. Tom Williams/CQ-Roll Call, Inc via Getty Images Schumer, a Democrat from New York, was sworn in on January 3, 1999.Schumer, 75, will be up for reelection in 2028. Sen. Mike Crapo — 27 years Sen. Mike Crapo. Anna Moneymaker/Getty Images Crapo, 75, is a Republican who has represented Idaho in the Senate since January 3, 1999. He will be up for reelection in 2028. Sen. Dick Durbin — 29 years Sen. Dick Durbin. Eric Lee/Getty Images A Democrat from Illinois, Durbin was sworn in as a US senator on January 3, 1997. At 81, he is not seeking reelection and will retire at the end of his term. Sen. Jack Reed — 29 years Sen. Jack Reed. Eric Lee/Bloomberg via Getty Images Reed's time in the Senate began on January 3, 1997. The 76-year-old Democrat from Rhode Island is running for reelection in the 2026 midterms. Sen. Susan Collins — 29 years Sen. Susan Collins. CHARLY TRIBALLEAU / AFP via Getty Images Collins, 73, is running for reelection in a high-profile race against Democratic challenger Troy Jackson in the 2026 midterms.A Republican from Maine, she has served in the Senate since January 3, 1997. Sen. Ron Wyden — 30 years Sen. Ron Wyden. Tom Williams/CQ-Roll Call, Inc via Getty Images Wyden, a Democrat from Oregon, was sworn in on February 5, 1996, following the resignation of former Oregon Sen. Bob Packwood.He is 77 years old and plans to run for reelection in 2028. Sen. Patty Murray — 33 years Sen. Patty Murray. ALEX WROBLEWSKI/AFP via Getty Images Murray, a Democrat from Washington, is 76 years old and has been a member of the Senate since January 3, 1993.She plans to run for reelection in 2028. Sen. Mitch McConnell — 41 years Sen. Mitch McConnell. Pete Kiehart/Bloomberg via Getty Images McConnell, a Republican representing Kentucky, took office on January 3, 1985. At 84, he has experienced a number of health challenges in recent years, including a nearly four-week-long hospitalization that began in June after emergency responders were dispatched to his home.McConnell is not seeking reelection in 2026 and will retire when his term ends. Sen. Chuck Grassley — 45 years Sen. Chuck Grassley. Finn Gomez/Getty Images Grassley, a Republican from Iowa, is also the oldest sitting member of the Senate at 93. He has served as a senator since January 3, 1981.Grassley will be up for reelection in 2028, but he told reporters in October that he has not decided if he will run again. Read next Business Insider tells the innovative stories you want to know Business Insider tells the innovative stories you want to know Business Insider tells the innovative stories you want to know Business Insider tells the innovative stories you want to know