With Donald J. Trump headed to New York for his arraignment in Lower Manhattan, Mayor Eric Adams warned Mr. Trump’s supporters — particularly Representative Marjorie Taylor Greene — to behave themselves at protests and rallies.

“Although we have no specific threats, people like Marjorie Taylor Greene, who is known to spread misinformation and hate speech, she stated she’s coming to town. When you’re in town, be on your best behavior,” Mr. Adams said on Monday.

In a midday news conference at City Hall, the mayor singled out Ms. Greene, a conservative Republican from Georgia and staunch Trump supporter who has criticized the decision to indict Mr. Trump. She has advertised a demonstration planned for Tuesday with Jack Posobiec, an internet conspiracy theorist, and Graham Allen, a right-wing commentator.

While the mayor and Police Commissioner Keechant Sewell said that authorities have received no specific threats, the city has been readying itself for protests and plans to close streets and barricade demonstrators. All uniformed officers have been placed on alert.

“While there may be some rabble rousers thinking of coming to our city tomorrow, our message is clear and simple: Control yourselves,” Mr. Adams said. “New York is our home and not a place for your misplaced anger.”

Mr. Trump, the first American president to be charged with a crime, is expected to arrive in Manhattan on Monday as he prepares to turn himself in to the authorities on Tuesday.

He is expected to stay overnight at Trump Tower on Fifth Avenue before heading to Lower Manhattan on Tuesday to surrender at the office of the Manhattan district attorney and then be arraigned in the Manhattan Criminal Courts Building.

Mr. Adams reassured New Yorkers that the Police Department was equipped to handle Mr. Trump’s two-day visit, whatever may unfold. He urged residents to go about their normal routines.

“New York City is always ready,” he said.