Few studies have examined history of intimate partner violence (IPV) among sexual minorities. We assessed prevalence and predictors of IPV using a probability sample of California residents ages 18 to 70. Lifetime and 1-year IPV prevalence was higher in sexual minorities compared with heterosexuals but this was significant only for bisexual women and gay men. IPV of bisexual women, but not gay men, occurred in a heterosexual relationship. We tested whether the higher prevalence of IPV in gay men and bisexual women was explained by two mental health indicators--psychological distress and binge drinking--but this hypothesis was not supported.