Here are the facts.
Former Republican Sen. Jon Kyl of Arizona, a longtime lawmaker who spent nearly three decades representing his state in Washington, has died at the age of 84.
Kyl passed away after experiencing complications related to a neurological condition. Months earlier, in December 2025, he had withdrawn from public life after revealing that he was living with dementia.
The former senator leaves behind a lengthy record in Congress that included service in both the House and Senate, a senior role in Republican leadership, and years of work on major issues affecting Arizona and the American West.
Jon Kyl Served Arizona for Nearly Three Decades
Kyl began his congressional career in 1987 after being elected to the U.S. House of Representatives.
He served four terms in the House before winning election to the U.S. Senate in 1994.
Kyl officially began his first Senate term in January 1995 and remained in office until January 2013. During those years, he became one of the most prominent Republicans representing Arizona in Washington.
His colleagues eventually selected him to serve as Republican whip, one of the highest-ranking leadership positions in the Senate.
Kyl held that leadership position until his retirement in 2013.
He Returned to Washington After John McCain’s Death
Kyl’s retirement did not permanently end his Senate career.
In 2018, Arizona Gov. Doug Ducey appointed Kyl to temporarily fill the Senate seat left vacant following the death of Sen. John McCain.
Kyl took the oath of office in September 2018 and served through the end of that year before once again leaving the Senate.
The unusual return gave Kyl another opportunity to serve Arizona several years after he had originally retired.
Doug Ducey Pays Tribute to Kyl
Ducey was among the Arizona political figures who honored Kyl following news of his death.
Ducey praised Kyl’s nearly 30 years of leadership in Arizona, while also remembering the personal guidance and friendship Kyl had given him over the years.
The former governor added that he would deeply miss Kyl.
Kyl’s career touched several major policy areas, but he became particularly well known for his work involving Arizona’s water supply, public lands and other issues important to Western states.
Jeff Flake Remembers a Mentor and Colleague
Former Republican Sen. Jeff Flake also paid tribute to Kyl, calling him an important figure in Arizona’s political history.
“Arizona has lost a giant,” Flake wrote.
Flake described Kyl as a diligent and effective public servant whose seriousness and commitment to government service were widely recognized by his colleagues.
Speaking with reporters at the Capitol, Flake also recalled the personal advice Kyl gave him when he was beginning his own political career.
According to Flake, Kyl encouraged him to make sure his family understood and participated in his life in Washington rather than allowing public service to separate them.
Flake said that became some of the most valuable advice he received during his career.
He also praised Kyl’s character, describing him as both an effective lawmaker and a good man.
Water Policy Became a Major Part of Kyl’s Career
Kyl spent considerable time working on water policy, an issue with enormous importance in Arizona and across the Western United States.
Water rights, tribal agreements, population growth and long-term access to limited water supplies have shaped Arizona politics for decades.
Kyl participated in a number of tribal water settlements during his congressional career.
Those agreements were intended to resolve long-running disputes involving Native American tribes, state and local governments, and competing claims to water resources.
His work helped establish Kyl as an important figure in Western water policy.
Arizona State University later named its Kyl Center for Water Policy in recognition of his work on the issue.
Kyl Had a Major Role in Senate Republican Leadership
Beyond Arizona-specific issues, Kyl became an influential voice inside the Republican Senate conference.
He chaired the Senate Republican Policy Committee before later serving as Republican whip.
His Senate assignments also included work on major committees dealing with the judiciary, national security, taxation and defense policy.
Kyl was involved in debates over nuclear arms agreements, national defense legislation and Supreme Court nominations during his years in Washington.
His legal background often placed him at the center of some of the Senate’s most complicated policy and judicial debates.
He Helped During the Brett Kavanaugh Confirmation
Even after initially retiring from elected office, Kyl continued to play a role in Washington.
He assisted with the confirmation process for Supreme Court Justice Brett Kavanaugh, helping guide the nominee through meetings with senators ahead of the confirmation hearings.
Kyl’s familiarity with Senate procedure and his relationships with lawmakers made him a useful adviser during the closely watched process.
His involvement came shortly before Ducey appointed him to return to the Senate in 2018.
A Career That Began Long Before the Senate
Before entering Congress, Kyl worked as an attorney in Arizona.
He earned his undergraduate degree from the University of Arizona in 1964 and his law degree from the same university two years later.
Kyl practiced law in Phoenix before entering federal politics.
He was elected to the House in 1986 and took office in January 1987.
That began a congressional career that would ultimately stretch across more than 25 years of service.
Kyl Stepped Away From Public Life in 2025
In December 2025, Kyl announced that he was withdrawing from public life after receiving a dementia diagnosis connected to a neurological illness.
Flake said he spoke with Kyl shortly before that announcement.
During their conversation, Flake said he made a point of telling his longtime colleague how much Arizona residents appreciated what he had done for both the state and the country.
Flake also spoke about Kyl’s devotion to his wife and family.
Kyl died at 84, leaving behind a public-service career that spanned multiple decades and several generations of Arizona politics.
From the House of Representatives to Republican leadership in the Senate, his career included work on national security, the courts, Western water policy and some of the most significant political debates of his era.
