Ehrenreich was born Barbara Alexander to Isabelle Oxley and Ben Howes Alexander in Butte, Montana, which she describes as then being "a bustling, brawling, blue collar mining town."
Ehrenreich föddes Barbara Alexander till Isabelle Oxley och Ben Howes Alexander i Butte, Montana, som hon beskriver som att då vara "en myllrande, bråkig, arbetargruvstad" .