Amazon has said it may close more than a dozen warehouses and move thousands of workers out of New York City over a labor bill being pushed by Mayor Zohran Mamdani — and the e-commerce giant is likely to make good on the threat if the controversial legislation is enacted, industry experts told The Post.

The Delivery Protection Act would force Amazon to directly hire upwards of 5,000 delivery workers citywide who are currently employed by third-party contractors. Proponents say the legislation will increase workers’ pay and improve safety conditions at Amazon and other delivery firms including FedEx and DoorDash.

But Amazon doesn't directly employ delivery workers anywhere else in the country — and has a history of fiercely resisting efforts to change its policies in the US and abroad. The result, according to experts, could be not only that those 5,000 delivery jobs move out of the city, but also that Amazon shutters its 15 last-mile warehouses in the Big Apple and fires the additional 2,000 workers that staff them.

Early last year, Amazon closed seven warehouses in Quebec near Montreal amid a labor fight involving one of its last-mile facilities. The union, Confédération des syndicats nationaux (CSN), had organized the 300 workers at a warehouse in the town of Laval.

By March 2025, some 1,900 Canadians across seven warehouses and 2,800 delivery contractors for those facilities had lost their jobs.

“Amazon will retaliate, because it has to send a firm message to the rest of the country that ‘If you mess with us, this is what will happen,’” said Marc Wulfraat, president and founder of Montreal-based logistics consulting firm, MWPVL International.

“When you look at Amazon’s global operations, they close buildings left, right and center when there is union activity.”

According to real estate listings, the Montreal facilities are now vacant, with Amazon still paying rent on more than 1.6 million square feet of space that it spent hundreds of millions of dollars to build, according to Wulfraat. At least two facilities are being offered as subleases.

The Delivery Protection Act — first introduced a year ago by Queens Council Member Tiffany Cabán and reintroduced in 2026 — has strong support in the City Council with some 34 co-signers. But several, including Speaker Julie Menin, are “uncomfortable” with potential job losses, a source close to negotiations said.

“This bill will have to pass in some form,” particularly since the mayor supports it, the source told The Post, adding that the final result may make “both sides unhappy.”

Compromises that have been discussed include allowing independent contractors to continue to perform deliveries while requiring Amazon to provide more safety guarantees for workers, the source said. No vote has been scheduled.

Industry experts say parallels between Quebec and New York can’t be ignored , even as Amazon employs directly or indirectly more than 12,000 hourly workers in New York — more than twice as many as it did in Quebec.

Those include the 2,000 workers that staff last-mile warehouses and 5,000 more to deliver the goods. The Delivery Protection Act wouldn't affect 5,500 workers at Amazon's giant JFK8 fulfillment center on Staten Island, who voted to unionize in 2022 — a first at an Amazon US facility — but who still lack a collective bargaining agreement.

While Amazon employs unionized workers in Europe, it has made headlines since the pandemic battling unions in the US. It's now locked in litigation over allegedly hardball tactics it has used to fight labor organization in Bessemer, Ala., and Staten Island.

In April, the National Labor Relations Board ordered Amazon to the bargaining table with the Teamsters in Staten Island, but Amazon has filed lawsuits questioning the legitimacy of the NLRB.