Dirk Kempthorne, the Idaho politician who climbed from Boise City Hall to the U.S. Senate, the governor’s office and finally the U.S. Department of the Interior, died Friday evening in Boise at age 74, his family said. He had publicly disclosed a colon cancer diagnosis in March 2025 and had been receiving treatment, and relatives described him as a devoted husband, father and grandfather.
Family Statement And State Reaction
According to The Associated Press, the Kempthorne family released a written statement Saturday announcing his death and highlighting his knack for remembering names and small details. The AP reported that he died Friday evening in Boise and noted his colon cancer diagnosis last year. The family asked for privacy while they work out memorial arrangements.
Local Details And Flags Lowered
The Idaho Statesman reported that Kempthorne died "surrounded by those who loved him most" and described his passing as related to complications from late-stage cancer. Gov. Brad Little ordered U.S. and Idaho flags at state buildings to be flown at half-staff until the day after Kempthorne’s memorial service, the Statesman said. The paper added that the family will announce memorial details in the coming days.
From Boise City Hall To The Cabinet
Kempthorne first won public office as Boise mayor at 34 and spent seven years in city government before moving on to statewide and national roles, according to BoiseDev. He later served a term in the U.S. Senate and was elected governor in 1998. President George W. Bush nominated him as secretary of the interior in 2006, and the department’s nomination record shows he served through the end of that administration.
Interior Years And The Polar Bear Decision
As Interior secretary, Kempthorne approved a rule in 2008 listing the polar bear as a threatened species under the Endangered Species Act, as described in a press release from the Department of the Interior. He framed the move as consistent with the law while declining to use the listing to regulate greenhouse-gas emissions, a position that drew criticism from some environmental groups and observers. DOI published the department’s statement at the time.
Private Evacuation Work And A Personal Recollection
In a 2023 question-and-answer session at the George W. Bush Presidential Center, Kempthorne described helping to evacuate nearly 400 Americans and Afghan allies after the 2021 U.S. withdrawal from Afghanistan. He recalled a night during that effort when, as he told the audience, "That night, at a total loss for answers, alone, I knelt in prayer." The Bush Center Q&A recounts how volunteers and private donors chartered buses and an aircraft to move evacuees to safety, and Kempthorne later pointed to that rescue as one of his more personal projects.
He is survived by his wife, Patricia, their children Heather and Jeff and their families, the Idaho Statesman reports. Idaho officials and former colleagues offered condolences across the political spectrum, noting Kempthorne’s long record of public service in Boise and in Washington.
