The 6-foot-4, 273-pound prospect selected UNC over offers from Arkansas, Cal, Cincinnati, Duke, Georgia Tech, Illinois, South Florida, Syracuse, Virginia and Virginia Tech.
He was a top 10 performer in the Georgia Rising Seniors game.
Polino's lead recruiter was Tar Heel assistant Ron West.
Polino joins two Buford High alums already on the UNC roster - Nathan Staub and Mikey Bart.
He is UNC's 15th overall commitment in the 2015 class and fifth offensive lineman.
Nick Polino Profile
Polino Joins Tar Heel Class
Inside Carolina Top Stories
Seahawks Draft JonesJones joins Mitch Trubisky as the lone Tar Heels selected in the first three rounds of the 2017 NFL Draft.
Inside CarolinaYesterday at 8:31 PM
Trubisky Selected No. 2 OverallThe record-setting quarterback is the ninth player in UNC history to be drafted in the first 10 picks of the NFL Draft.
Inside CarolinaThursday at 5:15 PM
UNC Remains the Team to Beat for JerkinsAlthough he has made countless visits to UNC, the four-star safety will return to campus this June.
Inside CarolinaThursday at 6:43 AM
NFL Draft PreviewTrubisky could potentially become the ninth Tar Heel to be taken in the top-10 of the NFL Draft.
Inside CarolinaWednesday at 12:46 PM