New Yorkers enjoyed the safest summer in more than two decades — so says the city’s police department.

Despite what seemed like a series of headline-grabbing killings during the summer, including the shooting deaths of two people at last weekend’s J’Ouvert celebration, serious crime is down, said Police Commissioner William Bratton on Tuesday during his final news briefing on city crime.

“Detractors said it couldn’t be done. We have further reduced violence and serious crime across this city, yet again,” he said.

Overall, reported crimes were at the lowest level since 1994 when the city started accumulating crime statistics on its Compstat system, the commissioner said.

The NYPD noted that 1,946 murders occurred in 1993. There were 352 murders last year, police records show.

There were 1,610 fewer crimes reported during the months of June, July and August for a five-percent reduction in crimes reported during the same time period last year, Bratton said.

Mayor Bill de Blasio the statistics point to the improvements made in policing the city.

“It is clear from our success this summer that neighborhood policing works,” he said.