Gallup has conducted the annual poll every year since 1946 with the exception of 1976.
Fifteen percent of the 1,025 Americans polled said the woman they admire most is Michelle Obama, who is currently on a tour promoting her book "Becoming."
Talk show host Oprah Winfrey was second with five percent followed by Hillary Clinton and First Lady Melania Trump with four percent.
Hillary Clinton, the 2016 Democratic presidential nominee and a former US senator and secretary of state, has topped the list 22 times including the past 17 years in a row.
Nineteen percent of those polled said Barack Obama was the man they admired most.
Trump was second with 13 percent followed by former president George W. Bush and Pope Francis, who were tied with two percent.
Gallup said the survey conducted December 3-12 had a margin of error of plus or minus four percentage points.
Former US President Barack Obama and his wife Michelle are in talks to produce shows for Netflix, according to the New York Times.
The couple would make exclusive content for the US streaming site focused on uplifting stories, the paper suggested.
If confirmed, the deal would give a global platform for the Obamas, bypassing mainstream US media such as Fox News.
Netflix told us at the BBC it had no comment to make about the reports.
'Inspire'
Eric Schultz, a senior adviser to the former president, did not confirm the plans but said they would make sense.
"President and Mrs Obama have always believed in the power of storytelling to inspire," he told the paper.
"Throughout their lives, they have lifted up stories of people whose efforts to make a difference are quietly changing the world for the better. As they consider their future personal plans, they continue to explore new ways to help others tell and share their stories."
The New York Times said one possible show idea was for Mr Obama to moderate debates on issues such as health care, climate change and immigration- all of which dominated his eight years in the White House.
But the paper said there were no plans to use the shows to attack conservative critics or Donald Trump.
The streaming service's mix of original drama, films and other programming has proved popular globally, with subscriber numbers reaching nearly 118 million at the end of 2017.
And it has been investing heavily in content as it tries to grow that subscriber base - with hit shows such as Stranger Things and Black Mirror as well as films and documentaries.
It is unclear how much the Obamas will be paid if a deal is struck.
Mr Obama already connects directly to an audience through social media. He has has more than 100 million twitter followers and his Facebook page has been liked by 55 million users.
US Republican presidential candidate Donald Trump has launched a rare attack on Michelle Obama, saying "all she wants to do is campaign" for his rival.
He also accused the first lady of attacking Hillary Clinton in 2007 by invoking a line she had said about fitness to run the White House.
The Obama campaign had denied the line referred to Mrs Clinton.
Mrs Clinton, meanwhile, accused Mr Trump of threatening democracy if he did not accept the election result.
"We know the difference between leadership and dictatorship, and the peaceful transition of power is one of the things that sets us apart," she told a crowd in Cleveland, Ohio.
"Donald Trump refused to say that he'd respect the results of this election. By doing that, he's threatening our democracy."
Image copyrightAFPImage captionHillary Clinton was campaigning in the key swing state of Ohio
At his own rally in North Carolina, Donald Trump told supporters, "I see how much [Michelle Obama] likes Hillary."
"But wasn't she the one that originally started the statement, 'If you can't take care of your home,' right? 'You can't take care of the White House or the country?' Where's that? I don't hear that. I don't hear that."
Media captionClinton's not-so-secret weapon in Arizona: Michelle Obama
The New York businessman was referring to a remark Mrs Obama made in 2007 while campaigning for her husband, who was running against Mrs Clinton.
The first lady said: "If you can't run your own house, you certainly can't run the White House".
Some critics asked whether the comment had been aimed at Mrs Clinton's relationship with her husband, former President Bill Clinton.
But the Obama campaign maintained the line was not directed at the Clintons and instead referred to their own struggle with parenting during a campaign.
"So, we've adjusted our schedules to make sure that our girls are first, so while he's traveling around, I do day trips," Mrs Obama continued in her 2007 speech.
"That means I get up in the morning, I get the girls ready, I get them off, I go and do trips, I'm home before bedtime."
Media captionDonald Trump: "Hillary is so corrupt she got kicked off the Watergate commission."
What happens next?
The two candidates will spend the remaining 18 days before the election criss-crossing the US in their bid to persuade undecided voters. Expect to see lots of appearances in battleground states such as Ohio, North Carolina, Florida and Pennsylvania
Voters will go to the polls on Tuesday 8 November to decide who becomes the 45th president of the US
The new president will be inaugurated on 20 January 2017