Four people were killed, including a 16-year-old boy, and at least six others were wounded in a series of shootings across New York City Monday, according to police.

Five women were among the surviving victims of the gun violence that spanned four of the city’s five boroughs, authorities said.

The carnage began in the Bronx at about 2:15 p.m. when a 27-year-old man was shot in the head outside 1417 Longfellow Ave. in Longwood, cops said.

He was rushed to St. Barnabas Hospital where he was pronounced dead.

The 16-year-old victim was also fatally shot in the head around 5:45 p.m., in Bedford Stuyvesant, cops said.

He was taken to Woodhull Medical Center in Brooklyn where he was pronounced dead.

Then four hours later, a 38-year-old man was shot and killed in Harlem around 10 p.m., according to authorities.

The victim suffered a gunshot wound to the head and was later pronounced dead at Harlem Hospital, police said.

Another man, 56, was shot multiple times at 976 Simpson Street in the Bronx just after 11 p.m. and rushed to Lincoln Hospital, where he was pronounced dead, the NYPD said.

The victims were not yet identified pending family notifications.

An 18-year-old man and 19-year-old woman were both shot on Staten Island around 6:55 p.m., cops said. The man suffered gunshot wounds to both arms and the chest, and the woman was shot once in the chest, police said.

Both were taken to an area hospital in stable condition.

Less than an hour later, a 24-year-old woman was shot in the buttocks in the Bronx, authorities said.

She was taken to Jacobi Medical Center and is expected to survive.

The victim was not the intended target, law enforcement sources said.

The suspect fled on an electric scooter.

Three more women were shot and wounded in Riverbank State Park around 9 p.m. in upper Manhattan, police said.

A 33-year-old woman shot in the ankle and a 20-year old woman shot in the leg were taken to Mt. Sinai Morningside Hospital in stable condition, and a 28-year-old woman shot in the ankle reached Montefiore Medical Center in the Bronx by private means, police said.

No arrests have been made in connection to any of the shootings.