His son, Donald Trump Jr., cast the final votes his father needed to win the nomination on the second day of the Republican National Convention at Quicken Loans Arena in Cleveland, Ohio, on Tuesday.
"It's my honor to be able to throw Donald Trump over the top in the delegation count tonight," his son said.
The real estate mogul and reality TV star is set to formally accept the nomination during a speech at the convention on Thursday.
"It's unbelievable. It's surreal. I'm so proud of my father. I'm so proud. We all are," Trump's eldest daughter, Ivanka, told CNN, describing her father as an outsider to the American establishment. "It's amazing. He's the ultimate outsider and he did it. We are so proud of him."
New York totally cast 95 votes, 89 for Trump and six for Ohio Governor John Kasich.