Biden’s fundraising efforts were largely online because of the coronavirus pandemic.
Kamala Harris' running mate and the Democratic National Committee managed to pull a total of $364.5 million.
Of that total, $205 million were pledged online from small donors, Joe Biden’s campaign team stated Wednesday.
The previous record was set by Barack Obama and the DNC in September 2008, when he raised almost $200 million, according to CBS and New York Times reports.
"That figure blows me away," said the 77-year-old Biden in a statement thanking his supporters.
"Over $205 million, or 57 percent of the money we raised, came from online donations, from people like you, chipping in $5, $10, $20 at a time," the candidate added.
Having prepared his reelection campaign since he arrived in the White House in early 2017, 74-year-old President Donald Trump still has a larger overall war chest, but Biden has been drawing in ever-larger sums since winning the Democratic Primary in April.
"We have to keep breaking records if we want to ensure a fighting chance at winning this thing," Biden urged his supporters.