WASHINGTON — The battle for the GOP presidential nomination will continue through June and come down to California, according to an analysis released Thursday by the University of Virginia.

Donald Trump will secure the 1,237 delegates needed for the nomination, but just barely — at 1,239 — after California voters decide how to allocate their 172 delegates on June 7, said the university’s “Crystal Ball” report.

“With the slow-developing race and the possibility that no candidate might get a majority of the party’s national delegates, California’s Republican contest takes on a great deal of importance,” the report said.

The latest Public Policy Polling survey shows Trump ahead in the state with 38 percent support, Ted Cruz at 27 percent and John Kasich at 14 percent.

The projection giving Trump the nomination on the first round of votes at the convention is based on him capturing most of the delegates in ­upcoming races.

In Wisconsin, Trump would need to win 30 of the 42 delegates on April 5. Trump would need to hold his home turf of New York on April 19 by grabbing 81 of 95 delegates
And in California, he’d seal the deal by taking 109 of 172 delegates.