Christopher Coakley of IMF has a nice article on the topic:
When it comes to money, it is a man’s world. Or so it seems, judging from the faces of the great and the good who adorn the vast majority of countries’ bills and coins. Yet some countries do use their currency to honor the contributions of their female leaders, artists, and other trailblazers—past and present. The United States is a latecomer to the club, announcing in June 2015 that it would feature a woman on a banknote for the first time in over a century. So who are the women getting recognition—and why does it matter?
Good bit of info.