This is a stat that can never be proven. But I do think the % of women is higher than you think. Look around you next time you go to a Brewer Game. It really isn't that far off from 50/50. Now, you may dismiss this as women/girls just going along with their SO's. That are just casual fans, etc. Well, the same can be said for a high percentage of MALES that go to games. You know, the guys behind you who have no clue about baseball? They are there to party, or came as a group outing, etc. So I'm not sure the number of female baseball fans is much lower than males. I've worked in many different office environments over the last 25 years. In just about everyone of them there was a group of males who would gather around drinking their morning coffee and discussing in detail the ups and downs, manager decisions, different plays, injuries, etc of last nights game or baseball in general. I have to say, I have yet to see a group of women do this in an office. That's because a lot of people, and yes maybe women in particular, can be huge fans but don't dig into stats, strategy, etc. Personally, I don't think that makes someone less of a fan. Others have mentioned their wives, and mine is a huge fan (watches almost every game) as and still doesn't understand what a hit and run means. Now, how can you watch 150 games a year and not understand or want to understand the game in great in detail? I do not know.