Mayor Bill de Blasio will announce his bid to run for president as early as next week.

“I’m going to make my decision in the month of May and as soon as we have something to tell you, we’ll tell you,” the mayor said Thursday at a press conference about crime statistics.

But a source with knowledge of his planning told The Post the mayor is definitely joining the race and will likely make the declaration next week, giving himself some more time to fund-raise and distance from former Vice President Joe Biden’s April 25 announcement.

May is a busy month for the mayor. He turns 58 on May 8, he celebrates his 25th wedding anniversary with wife Chirlane McCray on May 14, and his son Dante graduates from Yale University on May 20.

De Blasio confirmed during the press conference that his political organization, Fairness PAC, is polling likely Iowa voters to help inform his decision.

“My PAC is polling, yes,” he said, declining to give details about the effort.

He’s already visited four primary states — including Iowa — in February.

De Blasio expressed confidence that he’d be at the top of a crowded Democratic field of around 20 contenders even though a recent poll found that 76 percent of New Yorkers didn’t want him in the 2020 race.

“I have never run for anything without intending to win,” he said.