Donald Trump scored the biggest crowd of any presidential candidate so far this election year Friday, drawing 30,000 raucous, cheering fans to his rally at a college football stadium in ­Mobile, Ala.

“I’m going to be the greatest jobs president that God ever ­created. You are going to be so proud,” he declared to tremendous cheers.

The bombastic businessman kicked off an hourlong monologue about himself at Ladd Peebles Stadium with a joke about his hair. “If it rains, right, I’ll take off my hat and I’ll prove once and for all that it’s mine,” he quipped.

Then he repeated his promise to build a wall along the southern border to keep out Mexicans.

He claimed that “7.5 percent of all of the births in this country are illegal immigrants . . . 300,000 babies a year that you have to take care of, that we all have to take care of. In the case of other countries, they don’t do that.”

He boasted about his annual income of $400 million a year and bashed politicians for accepting lobbyists’ cash. “I don’t want your money,’’ he insisted.

He took a direct shot at Jeb Bush, saying the former Florida governor has “very low energy” and is “weak on immigration.”

Bush got a dig in before Trump took the stage when his supporters flew a plane over the stadium with a banner that read: “Trump 4 Higher Taxes. Jeb 4 Prez.”

Trump provided his own aerial display. He had the pilot of his private 757, which he had boarded at La Guardia Airport, circle the stadium before landing.

The audience lapped it all up.

“We need more of a businessman rather than a politician I think running the country,” said Ronnie Dalimonte, 74, of Chickasaw, Ala., who was wearing a T-shirt that read “Re-elect no one.”

“All these politicians all say the same garbage all the time, ‘Blah blah blah.’ Nothing gets done. Trump’s talking like I like to hear somebody talking.’’

Some of The Donald’s diehard fans came from as far as LA and Pensacola, Fla., and waited up to seven hours in the steamy Alabama heat to score the best seats.

“I think he’s honest — at least he don’t lie. If there’s something that they got on him, [he’ll say] ‘I’ll tell you straight up, I’ve done it, but I did it for this reason,’ ” said Dean Suits, 67, of Foley, Ala.

Johnny Coleman, of Mobile, said, “I’m really an independent, but he’s saying some stuff we talk about at the house, that people talk about on the job. Stuff he’s saying makes sense.”

Prior to Friday night, the biggest crowd was the 28,000 people who showed up for Democrat Bernie Sanders in Oregon.