If I do, they are all closeted. I remember at a family reunion people saying my older cousin "had sugar in this tank" because he was in his late 20s and had never dated anyone, but I didn't know what it meant at the time. I also think one of my aunts is secretly a lesbian. She's like 50 something, has never been married, and is extremely conservative. She hates gays, thinks Obama is a Muslim, and doesn't believe in evolution. The funny thing is, she has this really butch haircut, a deep voice, always wears men's gym clothes, and is kind of muscular. Not trying to be stereotypical, but...
From what I know, my half sister is a lesbian and my cousin is bisexual/lesbian but not completely out of the closet (Ive seen her twitter & tumblr). I say not completely because I don't know if other people in our family know like if she's talked about it with her mom, my other cousins and/or brother
I have a gay cousin from my mother's part of the family (he a Janet stan) and gay cousin from my dad's part of the family (he a little monster but I'd **** his brains out)
Oh, I have another cousin who is very likely gay but I pity him so bad. His extremely religious family will NOT be accepting of it and I'm afraid he'll shame and hate himself for it.
I think there are gay/bi people in everyone's family, really. Even if it's just one person.
I have a cousin who's bi, but, I don't really communicate with him.