This review describes national plans of action for nutrition (NPANs) in six Southeast Asia countries (Indonesia, Malaysia, Myanmar, Philippines, Thailand and Vietnam) in order to provide an understanding of the approach and framework undertaken by these countries in the formulation and implementation of NPANs, as well as the similarities and differences in various NPAN components. The six countries recognised the persistent undernutrition and escalating rates of obesity and other diet-related chronic diseases as the key drivers for nutrition action plan implementation. The prioritisation of nutrition interventions outlined in these NPANs are based on respective country context and needs. Although differing in strategies and targets set, these countries show similarities in several components including objectives, stakeholder involvement, nutritional issues to be addressed, implementation, monitoring and evaluation mechanism, programme/ activities identified and challenges in implementing NPANs. Countries have recognised that effective implementation, monitoring and evaluation are essential to successfully address both extremes of the challenging nutrition situation. Several important similarities in the NPANs studied suggest that closer collaboration among countries and stakeholders on NPANs would be beneficial. Opportunities should be created for periodic exchanges to enable sharing of experiences in the development and implementation of NPANs among the countries. Recommendations and conclusions drawn from this review could serve as useful reference for nutrition policy and planning in the future.