Nato a [[Dublino]] da genitori [[Nigeria|nigeriani]], è poi cresciuto a [[Londra]] con il resto della famiglia.<ref name=obafemi>[https://www.independent.ie/sport/soccer/i-cant-stop-here-irish-youngster-makes-his-premier-league-debut-and-now-he-wants-more-36514263.html 'I can’t stop here' - Irish youngster makes his Premier League debut...and now he wants more] independent.ie</ref> È fratello di [[Afolabi Obafemi]], anch'egli calciatore.<ref name=":0">{{Cita news|lingua=en-GB|url=https://www.thesunirishtimes.iecom/sport/footballsoccer/3411396international/michael-obafemi-mumi-want-to-get-as-many-ireland-debutcaps-denmark/as-possible-1.3704080|titolo=Michael Obafemi: shares‘I touchingwant momentto withget mumas Bola aftermany Ireland debutcaps as possible’|pubblicazione=The Irish Sun|data=2018-11-19Times|accesso=2018-11-23}}</ref><ref name=":0">{{Cita news|lingua=en-US|url=https://www.irishtimesthesun.comie/sport/soccerfootball/international3411396/michael-obafemi-i-want-to-get-as-manymum-ireland-capsdebut-as-possible-1.3704080denmark/|titolo=Michael Obafemi:‘Ishares wanttouching tomoment getwith asmum manyBola after Ireland caps as possible’debut|pubblicazione=The Irish TimesSun|data=2018-11-19|accesso=2018-11-23}}</ref>
