Ultimately, more than 15 million people -- out of 237 million daily Twitter users -- voted on whether to reinstate the controversial profile, with 51.8 percent in favor and 48.2 percent against.
Trump, who had more than 88 million users when his accounted was suspended, reveled in using Twitter as a mouthpiece during his presidency, posting policy announcements, attacking political rivals and communicating with supporters.
On Saturday, several of his political allies were highlighting his return.
"Welcome back, @realdonaldtrump!" tweeted House Republican Paul Gosar.
Musk's poll asked for a simple "yes" or "no" response to the statement "Reinstate former President Trump," which the billionaire Twitter boss posted Friday.
"Fascinating to watch Twitter Trump poll!" Musk mused Saturday morning in a blast of tweets from the controversial and hard-charging new owner of the one-to-many messaging platform.
He has posed similar polls in the past, asking followers last year if he should sell stock in his electric car company Tesla. Following that poll, he sold more than $1 billion in shares.
Trump has said he will not return to the popular platform but would instead remain on his own network, Truth Social, launched after he was banned from Twitter.
Appearing via video Saturday at a gathering of the Republican Jewish Coalition in Las Vegas, Trump said he welcomed Musk's poll, and was a fan of the man himself, but appeared to reject any return.
"I do like him... you know, he's a character and again, I like characters," he said.
"He did put up a poll and it was very overwhelming... but I have something called... Truth Social."
As to whether he would return to the platform, he said: "I don't see it because I don't see any reason for it."
Musk, also the CEO of Tesla and SpaceX, has come under fire for radical changes at California-based Twitter, which he bought less than a month ago for $44 billion.
Since then, he fired half of Twitter's 7,500 staff, scrapped a work-from-home policy and imposed long hours, all while his attempts to overhaul the company faced backlash and delays.
His stumbling attempts to revamp user verification with a controversial subscription service led to a slew of fake accounts and pranks, and prompted major advertisers to step away from the platform.
On Friday, Musk appeared to be pressing on with his plans and reinstated previously banned accounts, including that of comedian Kathy Griffin, which had been taken down after she impersonated him on the site.
The company's offices were locked down Friday and hundreds of employees quit rather than yield to Musk's demands that they resign themselves to working long, grueling days at the new Twitter.