Research on the political preferences of lesbian, gay and bisexual (LGB) voters shows that they are more progressive than heterosexuals. However, few studies consider differences between heterosexual, gay/lesbian, and bisexual men and women. Furthermore, little is known about how these preferences have changed as society has become more accepting of diverse sexualities. We offer an analysis of Canadian LGB voters’ political preferences a decade and a half after same-sex marriage was legalized. Consistent with prior research, we find that gay men, and, to a lesser extent, bisexual men, are more left-wing than heterosexual men. A more novel finding is that bisexual women are the most left-wing group. Lesbian women are only slightly to the left of heterosexual women. While left-wing bisexual women are growing in number, the overall gap between LGB and heterosexual voters has remained stable across generations, because marriage narrows some of the preference gaps.