Rakeem Jones, 26, was being escorted from the rally on Wednesday night by sheriff's deputies in Fayetteville when John McGraw hit him, the Cumberland County Sheriff's Office said.
McGraw was charged with communicating threats, his online arrest report showed.
That charge can bring up to 45 days in jail and there was no lawyer listed on the report.
This comes after a reporter from US media outlet, Breitbart News Network, was allegedly manhandled by Trump's campaign manager, Corey Lewandowski, at Tuesday's rally in Florida.
The incident in Florida on Tuesday, involved Breitbart New Network reporter Michelle Fields, who was allegedly manhandled by Trump's campaign manager, Corey Lewandowski, as she stepped forward to ask Trump a question.
Washington Post reporter Ben Terris said he witnessed Ms Fields being grabbed and yanked by Mr Lewandowski.
Fields later posted a photo on Twitter of her arm which showed bruising.
Trump's camp said the event didn't happen and replied on Twitter by questioning Fields' character.
Video of the incident in North Carolina was recorded by bystanders showed deputies pinning Jones to the ground, prompting social media criticism on why swift action was taken against him instead of his assailant.
"He had no right to put his hands on me," Jones said in a telephone interview.
The sheriff's office said it would conduct an internal investigation, adding deputies accompanying Jones did not see the assault.
Sheriff Earl "Moose" Butler called the attack cowardly.
"Regardless of political affiliation, speech, race, national origin, color, gender, bad reputation, prior acts or political demonstration, no other citizen has the right to assault another person or to act in such a way as this defendant did," Butler said.
Trump's campaign rallies are boisterous, with the billionaire businessman often pausing to scold protesters and ask security officers to take them away. At a rally last month in Nevada, he said of a protester: "I'd like to punch him in the face."
The New York real estate magnate is the front-runner to be his party's nominee for the Nov. 8 presidential election.
Trump's hour-long speech in the packed North Carolina arena was interrupted at least 16 times, according to a Reuters reporter who attended.
A friend of Jones, Ronnie Rouse, said they attended the event to observe, not protest, and were told to leave after an exchange with another man who Rouse said used a racial slur.
Jones, who works for an inventory company and as a tutor, said the punch by a man in a cowboy hat came out of nowhere as he walked up the stairs to leave. He was then handled roughly by deputies but not arrested, adding his right eye was swollen and bruised.
"The whole arena cheered as I was being escorted out and even more so after I got hit," he said.
