
In a statement, his family said Bolger died peacefully yesterday surrounded by his nine children, 18 grandchildren and wife Joan.
It said over the period of his illness, Bolger and his family had greatly appreciated the support and companionship of so many friends near and far.
Joan and family thanked the renal team and staff at Wellington Regional Hospital and Wellington Free Ambulance for their care over recent months.
His family said Jim was much-loved and would be deeply missed.
Prime Minister Christopher Luxon said Bolger was a towering figure in New Zealand's political life - a leader of conviction, a reformer of consequence, and a servant of the people whose legacy has shaped the nation in profound and lasting ways.
Foreign Affairs Minister Winston Peters, Bolger's coalition partner in New Zealand's first MMP government, said he was a man of his word, and after leaving politics continued to advance the country's interests on the international stage.

"I sort of instinctively knew what it was like to be treated as second-class citizens, and Māori were treated as second-class citizens. And some people still want to do that," he told the programme in June - the day after a birthday celebration that included his nine children and 18 grandchildren.
Bolger was convinced of the benefits of cultural diversity, held strong views against racism and was in favour of redress for Māori. He negotiated the 2008 settlement of the Atihau-Whanganui Incorporation, which gained it $23.5 million in compensation from the government.
After his education at Ōpunake High School was finished, 15-year-old James Brendan Bolger went farming, first in Taranaki and then at Te Kuiti. He married Joan Riddell in 1963.
He entered politics via Federated Farmers - he had been vice-president of its Waikato branch - and won the new King Country seat for National in 1972. He built his majority over the years from the initial 1200 to more than 10,000 and held the seat for 25 years.
Bolger showed himself to be a quick learner and an effective debater in the House and following the 1978 election, he became a minister in the Muldoon government.
After National's defeat in 1984 he became deputy leader when Sir Robert Muldoon was replaced by Jim McLay. When McLay was ousted in 1986, Bolger's colleagues elected him to the top job.
He disliked being described as a pragmatist, but was sensitive to shifts in the public mood and accommodated them by adopting policies he had earlier rejected. For example, after National's 1987 defeat he steered the party away from its isolated opposition to an anti-nuclear policy. The move upset some of his MPs, but he saw it as looking to the future rather than the past.

Narrowly re-elected in 1993, Bolger moved to soften the government's image and dropped his hardline finance minister, Ruth Richardson. In the next three years, he kept National in power as internal strife affected all political parties in the run-up to the new MMP system.
1996 was the first election to be held under MMP and after it Bolger - nicknamed The Great Helmsman - formed a coalition government with New Zealand First. The negotiations took weeks and many in National believed Bolger had given away too much.
The coalition government floundered through its first year and Bolger's support ebbed. He was ousted in late 1997, in a rare coup against a sitting Prime Minister, by Jenny Shipley. He published an account of his years as Prime Minister, A View From The Top, in 1999.
He quit parliament in April 1998 to become ambassador to the United States returning to become chairman, under the Labour-led government, of New Zealand Post, Kiwibank, and the state rail system.
He became increasingly outspoken about broader political and social issues, going so far as to say, in 2021, that free-market capitalism was "on the verge of destroying the planet".
He was a persistent advocate of New Zealand becoming a republic and took no imperial honours, but was appointed a Member of the Order of New Zealand in 1998. Bolger was awarded the Queen Elizabeth II Silver Jubilee Medal in 1977, the New Zealand 1990 Commemoration Medal and the New Zealand Suffrage Centennial Medal in 1993. Massey University awarded him an honorary doctorate in literature in 2002.
He credited Joan for the huge support she gave him during his high-profile career.
"I've had a wonderful life with a wonderful wife and family and it's all been good."
The New Zealand flag will fly at half-mast on all government and public buildings today as a mark of respect.