A national Jewish civil rights watchdog group is launching a “Mamdani Monitor” to check Mayoral-elect Zohran Mamdani’s incoming administration for antisemitism.

The Anti-Defamation League said the group will scrutinize the background of Mamdani appointees and funding of organizations to see if they are hostile to Jewish people.

The organization also will create a specific “New York City Antisemitism Tipline” amid a surge in reports of anti-Jewish hatred following the Hamas-Israel war in Gaza.

ADL CEO and national director Jonathan Greenblatt said the unprecedented action is necessary because Mamdani espouses views that are antisemitic and associates with people who fan Jew hatred.

“The BDS campaign is antisemitic. Whether intentional or not, that’s what BDS is,” Greenblatt told The Post Wednesday, referring to the boycott, divestment and sanctions campaign against Israel supported by Mamdani.

“It leads to violence against the Jewish people. It seeks to delegitimize the Jewish state. It leads to bad things.”

He also noted that Mamdani doesn’t recognize Israel’s right to exist as a Jewish state.

“We want the Jewish people to know we have their back,” Greenblatt said.  

In a separate statement, he said Mamdani “has promoted antisemitic narratives, associated with individuals who have a history of antisemitism, and demonstrated intense animosity toward the Jewish state that is counter to the views of the overwhelming majority of Jewish New Yorkers.”

“We are deeply concerned that those individuals and principles will influence his administration at a time when we are tracking a brazen surge of harassment, vandalism and violence targeting Jewish residents and institutions in recent years.”

Greenblatt said he expects Mamdani to stand up against antisemitism in the city with the largest Jewish population outside of Israel, and where the ADL is headquartered.

“We will hold the Mamdani administration accountable to this basic standard,” said Greenblatt.

Other Jewish groups alarmed by Mamdani’s victory have put out statements saying they will fight against any Jew-bashing in city government — among them the New York Solidarity Network and the UJA Federation. 

The Mamdani campaign had no immediate comment.

But Mamdani, during the campaign, promised to devote more resources to combat antisemitism and other forms of bigotry.