Objective: To assess the association between current active and passive tobacco smoking and living witha same-sex partner in Spain. Methods: We analysed data from two cross-sectional national surveys of the Spanish population 15 years and older (2011-Encuesta Nacional de Salud en España and 2014-Encuesta Europea de Salud en España). Analyses included only people living with their partner. Associations were calculated using multiplelogistic regressions adjusting for gender, social class and age. Results: Current active and passive smoking were significantly associated with living with same sexpartners (odds ratio: 2.71 and 2.88), and particularly strong among women. Conclusions: Spanish adults living with same-sex partners are at higher risk of active and passive smok-ing. This risk varies by gender. Spanish national surveys should include items on sexual orientation forimproved data on health disparities.