Slightly over 15 million Twitter users voted in the poll with 51.8 per cent voting in favour of reinstatement.
“The people have spoken. Trump will be reinstated,” Musk tweeted.
Trump’s Twitter account, which had over 88 million followers before he was banned on January 8, 2021, began accumulating followers and had nearly 100,000 followers by 10 pm on Saturday.
Some users initially reported being unable to follow the reinstated account on Saturday evening.
Trump had appeared less than keen earlier in the day.
“I don’t see any reason for it,” the former president said via video when asked whether he planned to return to Twitter by a panel at the Republican Jewish Coalition’s annual leadership meeting.
He said he would stick with his new platform Truth Social, the app developed by his Trump Media & Technology Group startup, which he said had better user engagement than Twitter and was doing “phenomenally well”.
Twitter did not respond to a request for comment. Trump, who on Tuesday launched a bid to regain the White House in 2024, praised Musk and said he had always liked him. But Trump also said Twitter suffered from bots, and fake accounts and that its problems were “incredible”.
Musk first said in May he planned to reverse the ban on Trump, and the timing of any return by Trump was closely watched – and feared – by many of Twitter’s advertisers.