The US reported a record of more than 60,000 daily confirmed cases of coronavirus on Tuesday, according to Johns Hopkins University.
The previous highest tally was 55,220, which the US recorded on 2 July.
The latest figures come as the states of California and Texas each reported more than 10,000 new daily cases.
US President Donald Trump said on Tuesday that America was "in a good place" regarding the pandemic.
But Dr Anthony Fauci, infectious disease expert and adviser to the White House on coronavirus, said the country was still "knee-deep" in only its first coronavirus wave.
The US has had by far the highest number of confirmed cases and deaths of any nation.
More than three million infections have been recorded across the US since the beginning of the pandemic, according to both the New York Times and NBC.
Covid-19 has been linked to more than 131,000 deaths in the US.
BBC
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