Abstract Background As smoking prevalence reduces, smoking inequalities across population groups is emerging as a key challenge. Despite recognition of specific needs among members of the Lesbian, Gay, Bisexual, Transexual Plus (LGBT+) community, differences in smoking across sexual identity groups is uncharted in Ireland and the community is not represented in tobacco policy agenda setting. This study aimed to measure and compare the prevalence of smoking, quitting intention and quitting behaviour across sexual identify groups in Ireland. Methods Secondary analysis of the 2023 “Healthy Ireland” cross sectional survey of health status was conducted (n = 7,411). For the first time, this survey included a question on self-reported sexual identify, along with standard questions on smoking prevalence, quitting intention and quitting behaviour. Prevalence of smoking, quitting intention and quitting behaviour were calculated with 95% Confidence Intervals (CI) and compared across groups with Chi Square tests. Results In total, 2.3% (95% CI 2.0-2.7%) of respondents reported an LGB+ identity. Compared to those reporting straight identity, LGB+ respondents reported higher smoking prevalence (17.6% versus 21.4% respectively); intention to quit was similar across groups, however, LBG+ respondents also reported a higher prevalence of making at least one quit attempt in the previous 12 months (51.3% versus 78.0% respectively, p < 0.0001). Conclusions While this study highlighted tobacco-use as a health challenge for the LGB+ community in Ireland, it also identified an opportunity for tailored stop smoking approaches to support quit success. As a consequence, an innovative Fulbright-sponsored policy dialogue was convened between leaders in tobacco control, LGBT+ community leaders, health services and academia across Ireland and the USA to explore solutions, underlining the important role equity stratifiers and population surveillance play in agenda setting for public health. Key messages • Including sexual identity in the national population health survey enabled tobacco-use needs across sexual identity groups in Ireland delineated for the first time. • Equity-stratified population health surveillance informed a policy dialogue to better represent needs of LGBT+ community in public health agenda setting.