Suicide attempts (lifetime) were reported by 13.6% of participants; 45.2 % had suicidal ideation in the past year and 9.5% said future suicide attempts were likely. LGB stigma and discrimination experiences were significantly associated with all three aspects of suicidality. These included school stigma factors (e.g. teachers not speaking out against prejudice, lessons being negative about sexual minorities), negative reactions to coming out from family and friends, and LGB-related harassment or crime experiences. Bisexuality, not feeling accepted where one lives, younger sexual minority identification and younger coming out were also associated with suicidality. Significant non-LGB factors included female gender, lower social support, anxiety / depression help-seeking, abuse / violence and sexual abuse.