The 24-year old former FC Utrecht and Vitesse Arnhem player is set to arrive at Carrow Road on July 1. Norwich did not disclose the transfer fee but British media said the deal was worth about eight million pounds.
"Ricky's profile is a perfect fit for us - he's young, ambitious and a proven goal-scorer," Norwich manager Chris Hughton told the Norwich website.
"He has an excellent goalscoring pedigree and he's a young man very keen to continue his personal progression and to play in England. He's already an exciting talent but he still has more development as a player ahead of him.
"I'm delighted we've been able to agree a deal with Sporting Lisbon and with Ricky and we look forward to welcoming him to the squad in July, once all of the paperwork gets sorted out."
Van Wolfswinkel, who has become Sporting's top striker having joined for 5.1 million euros from Utrecht in June 2011, has played once for the Netherlands.
With the club's presidential election looming this weekend, the prospect of selling Van Wolfswinkel has angered candidates.
"Sporting should not have to sell players to pay salaries. We cannot accept that," Bruno de Carvalho, the front-runner in the polls to be the next president, told o Jogo daily this week.
