The 25-year-old comes from the Ligue 1 champions after agreeing terms with the North East side last week and after completing his international duties with France last night, flew to Tyneside to complete the deal.
Cabaye told the club’s official site: "This is a fantastic move for me. I have enjoyed great times with Lille but the time is right now to test myself against the best and playing for Newcastle United in the Premier League does just that.
"My first impressions of the club and the city are that it is a lovely place and the stadium is magnificent.
"Now that I have signed I am looking forward to meeting the rest of the team, working with Alan Pardew and his staff, but most of all playing for Newcastle United and their supporters."
A native of Lille, Cabaye appeared over 250 times for the Ligue 1 side, scoring 39 goals in the process and was part of the team that won the French domestic cup double.
The midfielder’s new manager Alan Pardew expressed his delight over the signing of such a proven player as Cabaye.
"We are delighted to have signed Yohan on a five-year contract,” said Pardew.
"He has a first class pedigree having proved himself at the top level in France, both for his club and the national team. He will add great quality to our squad and I am really looking forward to working with him."