The social determinants of Aboriginal and Torres Strait Islander adults who do not smoke in regional Australia.

High income was associated with non-smoking (Prevalence Ratio [PR] = 2.07; 95% CI: 1.66-2.57) and never-smoking (PR = 2.02; 1.46-2.79), as was completing year 10 (non-smoking PR = 1.34; 1.12-1.61 and never-smoking PR = 1.56; 1.20-2.03). Better food security was associated with a higher prevalence of never-smoking (PR = 2.42; 1.48-3.98). Lower psychological distress scores were associated with non-smoking (PR = 1.30; 1.10-1.53) and never-smoking (PR = 1.56; 1.21-2.01). Never-smoking was more frequent in participants reporting no experiences of unfair treatment (PR = 1.59; 1.22-2.06). Having a usual healthcare provider was associated with non-smoking (PR = 1.38; 1.02-1.86). Positive exposure to the SDOH were associated with non- and never-smoking among Aboriginal and Torres Strait Islander adults in regional Australia. Structural and systemic changes to address the SDOH, including discrimination and racism, are expected to accelerate non-smoking behaviours and improve health outcomes for Aboriginal and Torres Strait Islander peoples.