Barca moved six points clear with two games to go, but their favourable head-to head-record over second-place Real Madrid sealed their triumph.
Barcelona took a first-half lead after Seydou Keita headed home Xavi's cross.
But Levante equalised just before the break when on-loan Manchester City striker Felipe Caicedo took advantage of Gerard Pique's mistake to level.
It was only the 20th goal that the Catalan giants have conceded in the league this season but it could not prevent them winning their 21st league title.
Barcelona, who play Manchester United in the Champions League final on 28 May, pushed for the winner but despite going close settled for a point against mid-table Levante.
Coach Pep Guardiola said: "Winning the league was been extremely tough and we are very pleased.
"We have been tremendous for three quarters of the season but in the last quarter we have struggled to score goals.
"If we have experienced a dip in form towards the end of the season, it is because of the inhuman schedule over the last two years. We have barely stopped."
And Lionel Messi, who has weighed in with 31 league goals, added: "I'm delighted because it has been a very difficult title to win.
"We've had to work very hard to be champions and more so against a great rival like Real Madrid. Now we have to enjoy it."
Courtesy:BBC
