text: how old was virgin mary when she gave birth to jesus?   no one really knows, but if cultural norms for her time and place are any indication, probably in her mid teens.  before anyone shudders at this thought and starts making it out to be some kind of sick thing, though, remember that people lived much shorter lives back then -- therefore, they tended to marry and have kids much earlier than we do.  also remember that today's laws dealing with minors simply did not apply 2,000 years ago.  in fact, they didn't even exist.