I've been into Yuri for ages, and it does seem like a lot of guys like Yuri because "omg hot girls" but there are other female Yuri peminat-peminat out there, like me! I've always wanted to be a member of a female Yuri peminat club though, so I don't feel so weird, in a sea of fanboys... Hi from a fellow fem Yuri lover, though!
Probably most of them, but it's like how a lot of girls are Yaoi fans. Anywho, I myself am a girl and like both, though good old hetero romance is always appreciated as well. (Sorry if that seemed an insensitive way to refer to it ;-;) Bullt like already mentioned, there are definitely some female yuri fans.
I'm a male and a yuri fan, and from what I've seen from interacting with other people is that most yuri peminat-peminat are female (or at least females will let others know lebih than males will). I haven't really seen males that will openly admit they are yuri peminat-peminat in person, but it's always reassuring knowing there are other male yuri fans. Either way, I wouldn't say I feel out of place, but I am hesitant to bring it up sometimes, which is sad.