I whanau a Wahlberg i te takiwa o Dorchester o Boston, Massachusetts, ko ia te mea iti rawa o nga tamariki e iwa, tae atu ki te kaiwhakaari a Robert me te kaiwhakaari-kaiwaiata a Donnie. Ko tana whaea, a Alma Elaine (née Donnelly), he kaitiaki putea me te kaiawhina o te kaiawhina, a ko tona papa, a Donald Edmond Wahlberg, he taraiwa tuku. I wehewehea ona maatua i te tau 1982, ana muri iho, ka wehewehea e ia tona wa i waenga i a raua. Ko tana papa he uri Swedish me Irish, a ko tana whaea he uri Irish, Ingarihi, me French-Canadian. Na te whaea, he whanaunga tawhiti a Wahlberg ki te kaituhi a Nathaniel Hawthorne. I whakaarahia a Wahlberg ki te Katorika Roma, a ka haere ki te Kura Tuarua o Copley Square i Newbury Street i Boston. I te tau 13, kua ngoikore a Wahlberg ki te cocaine me etahi atu taonga. Kaore ia i whiwhi i tana tohu kura tuarua tae noa ki te Pipiri 2013.
Ko te tau 1982