Whakaotihia te rerenga e whai ake nei: I whanau a Crosby i te Whare Hauora o Grace Maternity i Halifax, Nova Scotia i te Akuhata 7, 1987 ki a Troy me Trina (née Forbes) Crosby. Ko te nama jersey a Crosby (87) me te hainatanga kirimana 2007 ($ 8.7 miriona ia tau) e whakaatu ana i tana ra whanau (8/7/87). I tipu ake a Crosby i te tata o Cole Harbour, ana he tuahine taina ko Taylor. Ko tana papa a Troy he kaitiaki i takaro mo te Verdun Junior Canadiens i te Quebec Major Junior Hockey League (QMJHL). I takaro hoki ia i te 1985 Memorial Cup, a, i kowhiria e te 240 o te katoa e nga Montreal Canadiens i te tau 1985
1984, engari kaore i takaro i te taumata NHL. I a ia e tipu ana, i miharo a Crosby ki a Steve Yzerman, a, penei i tana papa, he kaiwhaiwhai a Canadiens. I tiimata a Crosby ki te takaro hokai i a ia ano i roto i tona rūma i te rua o ona tau, e pupuhi ana i nga pu i roto i te kupenga i whai i te miihini whakamaroke o te whanau i muri i a ia, i arahi ki te pohehe roa e mahi ana ia me te miihini whakamaroke; i ako ia ki te reti i te toru o ona tau.