Clinton, 68, expressed her views more clearly than 70-year -old Trump, and had a better understanding of the issues by a margin of more than 2-to-1, the CNN/ORC poll said after the fiery debate between the two contenders to the White House, which was marked by personal attacks on both sides.
Clinton, who was repeatedly questioned by Trump over her "stamina" and her recent bout of pneumonia during the 90- minute clash, seemed to recover the lost ground with 56 per cent people terming her stronger leader, as opposed to 39 per cent who still reposed their faith in Trump's leadership.
Clinton was also seen as having done a better job addressing concerns voters might have about her potential presidency by a 57 per cent to 35 per cent margin.
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Almost 50 per cent said the debate did not make any impact on their voting plans, but those who said they were moved by it tilted in Clinton's favour, 34 per cent said the debate made them more apt to vote for Clinton as opposed to the 18 per cent who backed Trump.
On foreign policy, 62 per cent thought that Clinton will do a better job while 35 per cent favoured Trump.
On the economy front, the split is much closer, with 51 per cent saying they favoured Clinton's approach vs 47 per cent who prefered real-estate tycoon and billionaire Trump, who was grilled by Clinton for not releasing his tax returns and for threating to renegotiate the North American Free Trade Agreement if he was elected.
Clinton's better performance in the debate also boosted some of the higher-risk currencies with the Mexican peso, Canadian dollar and Australian dollar all surging.
Clinton has also improved her chances of winning the Novenmber 8 election in the online betting market.