Existing research demonstrates that child food insecurity is both consequential and common, but limitations in the range of countries, contexts, and time points for which data have been collected, and a lack consistency in what is being measured and how, has resulted in incomplete information for addressing child food insecurity, its causes and consequences. The effectiveness of a global monitoring system rests on two components: measurement of child food insecurity that reliably and accurately captures the phenomenon, and a vehicle for delivering that measurement to samples that support reliable and accurate inference to the populations of interest. In addition, the prevalence of food inadequacy is estimated indirectly, based on national food balance sheets reporting the quantities of food available in 113 countries [15]. These monitoring systems give a panoramic view on what is happening in a country, and they provide information about the adequacy of wages, existing resources, and benefits to meet food needs at household level, for the populations to which household samples are representative.