Implementation of effective cross-sectoral nutrition policies remains a challenge worldwide. By reviewing reports from World Health Organization meetings and consultations - convened for policy-makers representing Member States of the Western Pacific Region - we provide an insight into how national policy-makers and external actors can support different dimensions of nutrition policy implementation. Key insights of policy-makers attending food and nutrition-centred meetings include that country-level implementation of nutrition policy relies on strong policy design, organizational planning and governance mechanisms that promote collective responsibility across multiple sectors. Policy-makers responsible for implementing nutrition policies face major challenges resulting from limited capacity, both within and external to government, particularly in relation to monitoring and enforcement activities. Successful implementation of nutrition policy measures will require greater political will to provide the requisite resources and institutional structures to ensure sustained policy effectiveness. Nongovernmental partners, including international agencies and researchers, have an opportunity to support policy implementation by providing technical support to Member States to frame action on nutrition in a more compelling way. They can also help policy-makers to build the organizational and structural capacity to coordinate cross-sectoral policy. Improved policy design, planning and governance and strategic capacity-building, supported by external partners, can strengthen the sustained implementation of cross-sectoral nutrition policy and improve nutrition outcomes.