White House officials said that the project would create 3,000 jobs and Foxconn will invest $US10 billion into the factory.
"This is a culmination of many months of discussion between the White House Office of American Innovation and Foxconn", the official said.
The deal comes as President Donald Trump seeks to fulfill a promise to bring manufacturing jobs that have been lost in recent decades back to the United States.
In 30 years, Foxconn to open its major factory in the United States is a break with global manufacturing trends.
"It's going to be tough for any of his prospective opponents to criticize him for not doing the things he's supposed to do as governor, for not improving the Wisconsin economy", Scholz said.
Foxconn, which makes Apple's iPhone and other products at its China-based factories, won't make connected devices, at least at first. Up to 22,000 jobs could be created by factory indirectly as businesses look to serve the facility and its workers.
White House Chief of Staff Reince Priebus told a Wisconsin TV station that Trump was aboard Marine One over Kenosha, Wis., in April and spotted the site of a former Chrysler plant.
White House spokesman Josh Raffel confirmed that the Trump announcement would be about Foxconn, but he wouldn't release details ahead of the event.
"This is a great day for American manufacturing", said Speaker of the House Rep. Paul Ryan, a Wisconsin Republican.
"If I didn't get elected, (Gou) definitely would not be spending $10 billion" on the project, Trump said. But the company said it would be hiring 3,000 workers over four years - with the potential for further growth. This week, Trump told the Wall Street Journal that Apple CEO Tim Cook promised to build three plants in the USA in the coming years, but Cupertino has not made any announcements. A package of local, state and federal tax breaks may tally up to $3 billion, according to the Milwaukee Journal-Sentinel. State Sen. Alberta Darling, co-chair of the Wisconsin Legislature's budget committee, said any deal would be examined with a "fine-toothed comb" and need to win approval by the Republican-controlled Legislature.