The US economy grew at an annual rate of 33.1% in the third quarter, by far the largest quarterly gain on record.
The US Commerce Department said the growth was the fastest since records began in 1947.
It follows a historic 31.4% decline during the second quarter, as the US was among many world economies hit by the coronavirus pandemic.
The US government reports quarterly GDP changes as annual rates, meaning that the change for any quarter is calculated as if it had occurred for an entire year.
It is among the last major economic updates before next week’s presidential election, where incumbent Donald Trump is behind Democratic rival Joe Biden in the polls.
The economic good news will do little, however, to distract many voters from the human cost of the coronavirus pandemic, which has killed more than 227,000 people and left tens of million without jobs.
The government’s rescue package helped many and boosted consumer spending, which was a major factor in the GDP surge.
However, the GDP also still remains below where it was in the fourth quarter of last year, before the pandemic began, and further government help is in doubt.
Also, as the number of coronavirus infections shows little sign of slowing, there is the possibility the economy may be hit by another round of restrictions in some states.
Mark Zandi, chief economist at Moody’s Analytics, said: “We have a pretty noxious brew developing with the pandemic intensifying, the lack of any further government stimulus, and signs showing that the economy is already slowing pretty significantly.
“Many of the jobs in retailing, leisure and airlines have been permanently lost, and those folks will have to find different work, and that will take time.”
The Labor Department said on Thursday that 751,000 people filed for state unemployment benefits in the week ending 24 October, compared to 791,000 the previous week.
This was well below the record 6.867 million seen in March but still above the 665,000 seen at the peak of the 2007-09 recession.