More than 1 million voters have registered this cycle through Vote.org, the nonpartisan voter engagement organization announced Wednesday. 

About 17 percent of the new voters come from the top seven swing states, where the 2020 presidential race was decided by razor-thin margins. Vice President Harris and former President Trump now look headed toward a tight race this November, and a surge of new voters could make all the difference in key states. 

Vote.org has notably registered more than 376,000 voters in the weeks since President Biden withdrew from the presidential race in late July, when Harris launched her fast-tracked campaign.

More than 40,000 voters have so far been registered in Georgia, and roughly 37,000 were registered in Pennsylvania, two critical states where polling averages from The Hill/Decision Desk HQ show Harris and Trump separated by less than 1 percentage point. 

Tens of thousands more have been registered in Arizona, Michigan, North Carolina, Wisconsin and Nevada — all toss-up states that could decide the presidential race. Several of the battlegrounds also boast marquee races for the House and Senate as both parties fight for control of Congress.  

Young voters younger than 35 also made up a record-breaking 79 percent of the influx, according to Vote.org, which boasts an 81 percent rate of converting registrations into votes. 

That could be a boon for Harris, who has seen signs of surging enthusiasm among young Americans since launching her bid. An NBC News/SurveyMonkey survey published Wednesday found 50 percent of voters who are 18 to 29 years old back Harris, while 34 picked Trump.  

Of the Vote.org registrations this cycle, freshly eligible 18-year-olds account for 34 percent, compared to just 8 percent logged in 2020. 

“As we approach National Voter Registration Day this month and enter a critical stretch in this election season, Vote.org is primed to build on this momentum and capitalize on our strategic partnerships and programs to galvanize even more voters across the nation,” said Andrea Hailey, the nonprofit's CEO, in a statement. 

“Since 2020, anti-democracy forces across the country have pulled out every stop to prevent Americans from exercising their right to vote, with 24 states passing anti-voter laws. But we are fighting tooth and nail to break down every barrier standing between voters and the ballot box,” Hailey said.