Objective The study aimed to examine the associations between experiences of racial discrimination within communities with suicide mortality rates for Aboriginal and Torres Strait Islander people.

Methods Age-standardised suicide rates (ASRs) were calculated using suicides recorded by the Queensland Suicide Register (QSR) of Aboriginal and Torres Strait Islander people in Queensland from 2009 to 2015. Rate Ratios (RRs) were used to compare ASRs in areas with high and low levels of reported discrimination, and other comparative community-level risk and protective factors (remoteness, socio-economic resources, and Indigenous language use).

Results The age-standardised suicide rate was 31.74 deaths per 100 000 persons/year for Aboriginal and Torres Strait Islander people for the years 2009–2015. ASRs were significantly higher in areas where more of the First Nations residents experienced recent discrimination (RR = 1.33; 95%CI = 1.05–1.70, p = 0.02), and the age-specific suicide rate was significantly higher for those aged 25–34 in areas with more discrimination (RR = 1.67; 95%CI = 1.04–2.74, p = 0.03). By comparison, the ASRs were not significantly higher in areas with regional and remote communities (RR = 1.10, CI 95%=0.75–1.61, p = 0.60), or areas with lower socioeconomic resources (RR = 0.86, 95%CI = 0.66–1.13, p = 0.28). Areas in which more First Nations residents spoke Indigenous languages had significantly lower ASRs (RR = 0.71; CI95%=0.53–0.95, p = 0.02).

Conclusion Suicide mortality rates for Aboriginal and Torres Strait Islander people in Queensland were influenced by experiences of racial discrimination within communities and Indigenous language use, with greater associations reported than with socio-economic resources or remoteness. The findings reflect the public health risk of discrimination and provide evidence for enacting strategies to reduce institutional and personal discrimination to reduce suicide.