Using a nationally representative survey of 3,900 adults on Opinions about the Environment and Global Warming 2010, this study investigates demographic differentials in the concern about climate change and climate-relevant behaviours in Thailand. The factor analysis of 11 environmentally friendly and carbon emissions reduction behaviours identifies two factors underlying climate-relevant behaviours: (1) electricity and water saving efforts; and (2) technical and behavioural change. The multivariate analyses show that women and individuals with higher education are more likely to worry a great deal about global warming and to perform technical and behavioural change. That education is positively related to technical and behavioural change but not with electricity and water saving actions could be because the former requires greater efforts and knowledge to pursue while the latter is commonly taken for economic reason. Concern about global warming and experience of environmental problem also increase the adoption of climate-relevant behaviours. Moreover, there is a spill-over effect of community-level education such that individuals living in a community with higher level of education are more likely to be concerned about climate change likewise.