According to CNN/ORC snap poll said 62 percent of respondents felt Clinton won and 27 percent believed Trump was the winner.
Other pols had similar numbers, but gave Clinton a much smaller lead. According to Vox, Public Policy Polling found 51 percent of Americans thought Clinton won, compared to 40 who gave the debate to Trump.
It also cited two focus groups of undecided voters, one in Florida and another in Pennsylvania, both which said Clinton beat Trump in their first televised conformation.
However, Time's online poll gave Trump the win, with 58 percent of readers saying he won to Clinton's 42 percent.
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Trump, a real estate tycoon making his first run for public office, said Clinton's long years of service represented "bad experience" with few results and said she lacked the stamina to serve as commander-in-chief.
Clinton was under pressure to perform well after a bout with pneumonia and a drop in opinion polls, but her long days of preparation appeared to pay off in her highly anticipated first 90-minute standoff with Trump.
Trump, a former reality TV star who eschewed a lot of debate practice, was strong early on but appeared to become repetitive and more undisciplined as the night wore on in front of a televised audience that could have reached upwards of a record 100 million people.
"You feel good tonight?" Clinton asked supporters after the event. "I sure do. We had a great debate."