Jose Mourinho's United team had needed to win against West Brom to keep the title race alive but surprisingly lost at home as Jay Rodriguez's header gave the league's bottom side a 1-0 win at Old Trafford.
Because of our win, City will no longer have the earliest title win, most points accumulated or a double over Manchester United.
The Premier League title is the 24th trophy of the former Barcelona and Bayern Munich boss' managerial career.
In the first half, United's players created just two chances to West Brom's four which prompted Mourinho to bring Lingard on for Ander Herrera and half-time and the Red Devils immediately looked more threatening on the attack - albeit with no reward.
The win was West Brom's first since a 2-0 success over Brighton on 12 January and only their fourth all season.
Jay Rodriguez struck the games only goal in the second half, and the Baggies held out for their first away victory since August.
The West Brom fans didn't miss a chance to make light of the situation on a day of disappointment for the home side. Everything was slow, everything was one more touch, one more flick, one more trick, one more turn, ball lost and no continuity or fluidity in our football.
Here's what pundits, managers and players have said after City won the league...
David De Gea - 4/10, 10/10 He was at fault for the second City goal to begin with. I was unfortunate enough to play against that quality United side that dominated in the '90s, but this side would have beaten them - that's how good they are. "I am pleased we managed to show everyone that today".
"I saw lots of people in the moon because we won against City. You could see the difference in the attitude to players compared to last week", said the Portuguese coach. It's a penalty and nothing else but I think we deserved to be punished.
Mourinho acknowledged that "City were the best team" in the Premier League, telling the BBC: "Sooner or later they would get the points, so no dramas when the best team wins the league".
This was the fifth season in which the Premier League title was decided at Old Trafford - more than any other ground in the competition. He name-checked eight games - Milan against Napoli, Schalke against Borussia Dortmund, Celtic against Rangers, P.S.V. Eindhoven against Ajax - but not the one that could decide the title.