Nassau County hasn’t given up the long- shot hope that the New York Islanders will move back to their longtime home arena, The Post has learned.

Despite the team’s new ownership giving no indication it was open to such a move, county officials are in talks with the team’s current landlord about a move back to the Nassau Coliseum, sources said.

The team is not a part of the talks.

“We decline to comment on ongoing discussions, however, we are supportive of the Islanders return to the [Coliseum],” County Executive Ed Mangano said.

Mikhail Prohorov, who owns Barclays Center, the team’ s current home, and operates the Coliseum — which is undergoing a top-to-bottom $260 million renovation — supports the concept of the Islanders moving back east, two sources close to the situation said.

However, Islanders owners Jonathan Ledecky and Scott Malkin are exploring the idea of building a new arena with the Mets owners near Citi Field in Queens.

The Islanders, who can get out of their Barclays lease in 2019, are also interested in building an arena on the Belmont Park site.

The Islanders, led by John Tavares, are distressed over their situation at Barclays because of poor attendance and ice conditions.

Barclays would rather move them to the Coliseum than lose them to a rival arena.

Nassau County is hoping the Queens and Belmont Park overtures are simply a bargaining ploy, sources said.

The Coliseum — now being down-sized — can wait until this fall for a decision and still adapt the building for an NHL team, sources said.

Barclays, the Islanders and the Mets all declined comment.