Major crimes on New York City subways and buses have surged in the majority of NYPD patrol boroughs so far this year — even as the citywide total is down about 1% — stoking new fears among straphangers.

The crimes shot up 32% in the Bronx North Patrol Borough, which includes Woodlawn, Kingsbridge, and Fordham, and 25% in the Manhattan North Patrol Borough, which includes the Upper West Side, Upper East Side and Harlem, NYPD data show.

Major transit crimes have also increased 17% in Bronx South, which extends from Mott Haven to Hunts Point, and 16% in Brooklyn South, which includes Coney Island, Crown Heights and Park Slope. In the Queens South Patrol Borough, which includes Jamaica and Ozone park, the same crimes rose 3%, the data show.

At the same time, the major index crimes are down 12% and 8%, respectively, in southern Manhattan and northern Brooklyn — bringing down the citywide crime stats.

The NYPD didn’t provide an official breakdown of the index crimes — murder, rape, robbery, felonious assault, burglary and grand larceny.

But a source familiar with the data said the crimes citywide are down 0.74% so far this year to 1,085 from 1,093 in the same period a year ago. 

Felonious assaults are up 4% citywide to 330 from 316 in the city’s transit system and robbery is up 10% to 216 from 197, the source said.

In total, the five patrol precincts with increases in subway crime have seen transit crime jump 21% to 428 from 351, according to the city’s CompStat 2.0 website.

At a press conference Thursday, Police Commissioner Jessica Tisch acknowledged the increases in robberies and assaults while noting more guns recovered and arrests up. She pointed out that subway ridership rose 5% compared to last year.

“We are also watching the categories where we have seen increases in transit: murders in transit are up by 2 year-to-date,” she said.

“We do not ignore increases – even when the overall trend is moving in the right direction,” Tisch said.

Criminals who are 18 years old and under are driving the increase in robberies, “including kids as young as 12 and 13,” she said.

She also pointed out that transit robbery arrests were up by 10% and felony assault arrests were up by 9% so far this year.

Officers have also recovered 39 guns in transit — the highest first-half year total on record, she said.

Riders at the 161st Street-Yankees Stadium subway station in West Concourse in the Bronx on Wednesday said they were aware of the dangers and taking precautions.

“I try not to travel alone at night,” said Nichole Steiner, who recently moved to the city from Fort Myers, Fla.

“I’ve witnessed a lot of people doing drugs, actually, on the subway,” said the 48-year-old, who often travels with her children. “I feel like we need more officers undercover riding the trains. People are pulling out crack pipes, pulling out meth pipes even between the trains.”

In a recent assault at the Fordham Road subway station, about three miles from Yankees Stadium, a stranger slashed a 24-year-old man on the right side of his face from behind as he was about to board a southbound No. 4 train around 3 p.m., cops said.

“It was bleeding real bad,” the victim, who asked to remain anonymous, told The Post this week about the June 16 slashing. “I put my shirt on my face to stop it.”

The NYPD’s Emergency Service Unit rushed the slashing victim to Saint Barnabas Hospital where he received about a half dozen stitches, he said, adding that “I do have a scar on my face.”

When asked why he thought the man slashed him, victim said: “I honestly have no idea. Maybe he thought I was somebody else.”

The NYPD released photos taken from surveillance footage at the station showing the at-large attacker dressed in a dark hoodie and sweatpants. He appears to be holding an object in the blurred photo.

It’s random violence like the knifing that many riders fear.

New Jersey resident Andrew Hughs, 21, said people need to protect themselves while riding the subway.

“I mean if you’re rolling the dice every time you hop on the train that should make you more nervous,” he said. “Be more alert, carry mace, carry legal forms of protection … but keep aware.”

Brooklyn resident Melissa De La Rosa said she appreciates the NYPD officers she sees in the system but is concerned things will worsen as the summer continues.

“I see a lot of police, so I don’t really feel as worried,” the 45-year-old said.

“But with it being so hot, I can only imagine how overwhelmed the system is gonna be now,” she said, adding that she travels with her kids. “And maybe there will be more disruptive people later at night.” So we’re trying to get there and back quickly.”