New Yorkers aren’t just the biggest jerks in America — they’re the most coldhearted, too.

A man was fatally struck by a train in Brooklyn Thursday morning, but that didn’t stop impatient straphangers from grousing about the delays caused by his death at the Newkirk Plaza station.

“That’s selfish,” one woman railed at the station in Flatbush, which runs the B and Q trains. “Now we have to go out of our way. That’s extra time, wasted time. I know someone died — but this is affecting a lot of people.”

The heartless response comes the same week a survey by Business Insider found that the Big Apple is considered the rudest city in America.

The 36-year-old victim was already on the subway tracks at around 7 a.m. when he was struck by a Manhattan-bound Q train that pulled into the station, officials said.

His name was not released on Thursday pending family notification.

Counselo Hernandez, who witnessed workers removing the man in a black body bag, said many straphangers were so caught up in the post-holiday frenzy that they didn’t even realize what had happened.

“The people were so busy running to work they didn’t even realize someone had died,” Hernandez said. “They weren’t paying attention.”

But commuters were quick to pile on online over the disruption to northbound service — prompting a terse response from the MTA.

“Yo @mta f- -k you! New Kirk Plaza too!” one woman tweeted.

@NYCTSubway replied, “Good morning. Someone was fatally struck at Newkirk Plaza.”

Still, the commuter continued to complain.

“I know that but there haven’t been announcements since it happened,” she wrote back. “Passengers now have to go to kings highway to cross over. Do your jobs!!!”

Another user complained: “Could we develop a way of dealing with these incidents that’s less impactful to service?”

MTA spokesman Andrei Berman called fatal incidents “devastating and heartbreaking for those involved” and insisted that dealing with them must “take precedence.”

“The aftermath of a tragedy on the tracks often requires a great deal of coordination between our frontline personnel and responding agencies,” he said.

“Appropriately tending to the tragedy at hand and determining exactly what transpired takes precedence over everything, even if that can sometimes lead to frustrating delays for our customers while we work to resume service as quickly as possible.”

Additional reporting by David Meyer