A knockoff baseball cap using the New York Mets’ orange and blue colors and iconic “NY” logo to boost Democratic socialist Zohran Mamdani’s mayoral campaign is being hawked online – without permission from the club or Major League Baseball, The Post has learned.

The cap reads “Zohran for NY Mayor,” with the interlocking “NY” being the trademarked Mets logo.

Some sellers, such as Good Shirts, which was charging $29.95 Friday for the commie cap, claim on their websites that “a portion of proceeds will be donated to Zohran Mamdani’s campaign fund.”

Another online seller, Eletees, was charging $40.95 per cap and boasts it’s “perfect for Mets games, political rallies, or casual outings, offering a stylish way to show support for both the team and the candidate.”

Selling unauthorized merchandise that uses MLB team logos, names and other trademarks is considered trademark infringement, and the league has a long history of suing bogus sellers.

MLB said it was unaware of the Mamdani Mets’ caps until notified by The Post and would review the matter. The Mets did not return messages.

Mamdani campaign spokesman Andrew Epstein said Mamdani is a Mets fan but has nothing to do with knockoff caps or its sellers.

He also insisted proceeds from the cap sales aren’t going to the campaign.

Eletees and Good Shirts did not return messages.