Obesity is increasing in prevalence in Singapore. This is part of a worldwide phenomenon. Action is being taken in Singapore to prevent and control obesity however. Obesity is most commonly caused by a combination of excessive food energy intake, lack of physical activity, and genetic susceptibility. The basic strategy of obesity prevention and control however is quite straightforward and lies in achieving the caloric balance which is to reduce calorie intake and increase physical activity. To be effective however, obesity prevention and control requires multiple prevention and control interventions across the lifespan. There is a need for Health Promotion Board (HPB) to engage and mobilise various partners and stakeholders. Policies and programs have been customised in Singapore for different segments of the population and conducted at various settings – in schools, workplaces, healthcare institutions, and communities. The current efforts to prevent and control obesity in Singapore can be grouped into 5 areas: (1) Health promotion policies; (2) Promoting supportive environments through social programmes; (3) HPB collaborating with partners to promote healthy behaviour; (4) Empowering partners and individuals; and (5) Raising awareness through health education and communication.