Mika comes from a family of three girls and two boys. He has one younger brother and one younger sister along with two older sisters. His sister Yasmine, who works as an artist under the nom de plume Dawack, painted the cartoon art for his album Life in Cartoon Motion.

Mika's "camp" performances have led to speculation that he might be gay. In response to media speculation on this theme he has been quoted as saying "I never talk about anything to do with my sexuality. I just don't think I need to. People ask me all the time. But I just don't see the point." He added that "in order to survive I've kind of shut up different parts of my life, and that's one of them, especially this early in my career."

He denied allegations that he is steering clear of sexual taboos in order to appeal to the US market, pointing to the song "Billy Brown", which is about a man who has a homosexual affair. He is quoted as saying, "If I was worried about sexual taboos I certainly wouldn't hav