The woman who suffered a split lip after confronting a violent subway “manspreader” is back riding the N-train — but wary that her attacker is on the loose.

“That bastard is still out there,” Sam Saia, 37, told The Post on Friday after her commute home.

“I’m afraid he might retaliate. But I’m not going to back down.”

Saia got socked in the mouth during her commute Thursday morning when she told a manspreading creep to stop pushing her against the wall with his legs.

The creep flew into a rage, shouting, “B—h, you ain’t nothing!

“I’ve raped white bitches like you, f- -king c- -t! You ain’t nothing, you f- -king b- - -h!” he told her.

A stranger, brave fellow Brooklyn commuter Victor Conde, leapt from his seat across the train and grabbed the attacker by the wrist, ordering him off the train at the next stop.

“He was definitely not all there,” Conde, 29, of Brooklyn, told The Post.

“She just wanted him off the train. So I said, ‘Get the ‘F’ off the train.'”

Her mouth still bleeding, Saia soon got off the train herself, in Midtown, near her job as a manager at an executive real estate company.

She walked to the 17th Precinct on E. 51st Street — only to be told by cops there that she needed to file the report with transit cops in Brooklyn, where the incident happened.

But when she called Transit District 34 as directed, cops there told her not to bother heading back there, because she could file a complaint at any precinct.

Her Twitter complaints about the runaround prompted the commanding officer at the 17th Precinct and the chief of all NYPD Transit to personally tweet back Friday morning with promises of speedy assistance.

“It’s a shame I had to put it on social media for something to be done about it,” Saia said Friday night.

The head of the 17th Precinct, Deputy Inspector Nicole Papamichael, personally apologized, Saia said.

Now, “They are going above and beyond to help me,” she said, happily.

Precinct detectives, aided by a fellow straphanger’s viral cell phone video of the moments after the attack, were hunting for the attacker Friday night.

“I’m a little floored. I’m sorry I had to blow this up,” Saia said.

“I’ve looked back at my original [Facebook] post, and it was shared a thousand or something times.”

She’d only posted it “to get his face out there,” she said.

“Just keep riding,” she said in a message to other straphangers. “Don’t be afraid. Just be alert. Just be vigilant.”

And to the creep who attacked her, Saia had these words: “I would want to understand how you could do that to somebody.”