Many reacted quickly, hitting the streets across New York City, popping bottles, singing and chanting.
RELATED: Joe Biden is set to become the next president of the US
Celebration in the streets began during the day and into the night from neighborhoods across the city -- perhaps one of the biggest was in Times Square.
Late Saturday morning, ABC News and other networks began declaring Biden the president-elect.
Horns were honking and applause could be heard in the streets. There was a big party in Times Square where thousands took to the streets some coming from out-of-state.
Thousands also gathered at Grand Army Plaza in Brooklyn.
Even with news of new leadership, the protests haven't stopped as a BLM March was planned in Highland Park, Brooklyn Sunday morning along with other rallies throughout the city.
On Long Island, supporters of President Trump rallied. Hundreds of people waved Trump flags for hours at the Dennison building in Hauppauge.
A caravan of cars with flags, honked their horns in support of the president and echoed his claims of voter fraud during the election.
A similar rally was held in Huntington Station, where more people gathered in support of the president.
RELATED: What's next for President Trump?
MORE COVERAGE OF THE PRESIDENTIAL ELECTION
Joe Biden set to become the next president
Kamala Harris' journey to VP-elect
Cheers, horn-honking and dancing in NYC with word of Biden victory
Here's how Joe Biden heard cheers in Brooklyn
What's next for President Trump?
The transition challenge ahead for Biden
Joe Biden's journey to the presidency
President Trump faces tough road in legal challenges
Celebrations, protests erupt in the streets
Doug Emhoff set to become first Second Gentleman