Amazon is ramping up its New York charm offensive.

In an open letter on Saturday, the online retail behemoth ticked off a slew of benefits it promises to bring to Long Island City, where it has stirred controversy since it selected the Queens neighborhood in November as a site for its new HQ2 corporate headquarters.

“Happy New Year from your future neighbors at Amazon,” the web giant began in the letter to New Yorkers, which was published Saturday in The Post and other news outlets.

Amid alarming reports about potentially strained sewage systems in the neighborhood by the influx of 25,000 new employees as well as critics who are upset about Amazon’s employment polices, tax incentives and just about everything Amazon stands for, the company is determined to get off on the right foot.

It detailed the investments it’s making in New York, including the tens of thousands of diverse jobs it’s creating, the $27 billion in tax revenues it’ll generate and even real estate that it’s donating to establish a new public school in Long Island City.

“We wanted to make sure you knew some of the details of the investment we are planning in Long Island City and for its residents,” Amazon said.