The New York Times described the former president as an "Indispensable Man of Indian Politics".
Pranab Mukherjee believed deeply in the importance of India and the US tackling global challenges together, Democratic presidential candidate Joe Biden has said, condoling the death of the former president.
Several other prominent US leaders and organisations also condoled Pranab Mukherjee's death, saying he will go down in history among India's most distinguished statesmen and scholars.
The 84-year-old veteran politician died after he suffered a septic shock on Sunday. He died of a cardiac arrest on Monday evening following a 21-day battle with multiple ailments.
"President Shri Pranab Mukherjee was a devout public servant who believed deeply in the importance of our two nations tackling global challenges together. Jill and I are saddened to hear of his passing - our prayers go out to his loved ones and the Indian people," Joe Biden said on Monday.
As a Senator, in particular as member of the Senate Foreign Relations Committee and its chairman and later as the vice president of the United States, Joe Biden had a strong friendship with Pranab Mukherjee, who was one of the most well-known Indian leaders in the US.
According to Deputy Secretary of State Stephen Biegun, a strong US-India partnership will be one of Pranab Mukherjee's many lasting legacies.
"He''ll go down in history among India''s most distinguished statesmen and scholars, and his many visits to Washington, everything he did for the relationship, played an instrumental role in expanding this US-India relationship, both in defence and external affairs when he was the minister," the top American diplomat said during the virtual India US Leadership Summit organised by the US India Strategic and Partnership Forum (USISPF) on Monday.
"Our thoughts and prayers are with his family and friends," the USISPF said.
Condoling Pranab Mukherjee's demise, the South and Central Asia Bureau of the State Department in a tweet said, "We stand with the people of India as they grieve the loss of a great leader who will be forever remembered in the annals of Indian history."
The US India Business Council said with Mukherjee's death, India lost an incredible statesman. He was a longtime supporter of the US-India partnership, it tweeted.
The New York Times described the former president as an "Indispensable Man of Indian Politics".
"His 50-year career set an everlasting example for the world''s largest democracy," Congressman Pete Olson said.
In a statement, Indian Overseas Congress, USA, expresses its deep sorrow and sincere condolences on the demise of Mukherjee.
"He was a quintessential congressman, formidable leader and a great parliamentarian," said George Abraham, vice-chairman of the IOC, USA.
"NRIs across the globe will fondly remember his contribution to the country in various capacities as a political leader, minister of important portfolios, sharp troubleshooter and a statesman with an independent mindset who adorned the office of the presidency. We also pay tribute to the pivotal role he has played in passing the Indo-US civil nuclear treaty despite the coalition partners'' threats," he said.
North America Telugu Society said Pranab Mukherjee leaves behind a rich legacy of his work, which will inspire generations to come.
He championed issues that lie at the heart of India's social, economic and developmental challenges -- literacy, healthcare, food security, energy security, rural and urban planning, economic empowerment, governance and administrative reforms, and national and regional security, it said.