Recent data show rising suicidality among high school girls. We posit this increase may be related to an overlooked factor: more girls identifying as LGBQ. Using four cohorts of national Youth Risk Behavior Survey data (N = 22,562 females, N = 22,130 males), we found that LGBQ identification among females rose from 15% in 2015 to 34% in 2021. LGBQ females consistently reported higher suicidality, although rates remained stable within both LGBQ and heterosexual groups. The rise in females' suicidality may stem from social pressures faced by LGBQ youth. Male suicidality and LGBQ identification showed smaller changes. More support for LGBQ students is essential to address this trend.