He defeated six other nominees through ranked-choice ballots, which were calculated until the final round to determine the winner.
"I am prepared to lead, excited to serve and profoundly humbled by the trust the people have placed in me," Youngkin tweeted.In recent days, Youngkin had picked up endorsements from prominent Republicans Sen.
Republicans picked the format after months of dispute about the process.
The final round came down to Youngkin and another businessman, Pete Snyder.Jennifer McClellan.
"Let me introduce you to Glenn Youngkin: Glenn's a Ted Cruz and Corey Stewart-endorsed, self-funding, Big Lie believing Trump loyalist who'll stop at nothing to advance the GOP's extreme agenda," McAuliffe tweeted.