A further 4.4 million Americans sought unemployment benefits last week as the economic toll from the coronavirus pandemic continued to mount.
The new applications brought the total number of jobless claims since mid-March to 26.4 million.
That amounts to more than 15% of the US workforce.
However, the most recent data marked the third week that the number of new claims has declined – a sign that the worst of the shock may be over.
"While this week's 4.4 million jobless claims are staggering, there are signs that the pace of layoffs has reached its peak," said Richard Flynn, UK managing director at financial service firm Charles Schwab.
"The key questions at this point are when can the economy reopen and what happens when it does?"
Economists have warned that the world is facing the sharpest slowdown since the Great Depression in the 1930s.
In the US, the economy is expected to contract 5.9% this year, according to the International Monetary Fund.
The US government has approved more than $2 trillion in rescue funds, expanding eligibility for unemployment benefits and increasing the payments.
But many people have had trouble getting through to state offices processing the applications.