The objective of this study is to estimate the prevalence of stunting and underweight among children under five in Cambodia, for smaller geographic areas than the provincelevel estimates given by the CDHS. Such a finely disaggregated map of malnutrition may help decision makers better allocate limited resources towards those who need them most. To achieve this, a modified version of the small area estimation technique developed by the World Bank Development Economics Research Group was employed, using the CDHS, the Cambodian Census, and a range of geographic information. The method has been used successfully in over 10 countries to estimate poverty; in this study the method is being applied for the first time to estimate nutritional outcomes. The next sections describe the methodology and implementation, the data used, and a discussion of the results.