The purpose of this paper is to discuss the measures of child welfare that are available and how appropriate they are to defined needs. We are concerned primarily with child welfare outcomes. But good monitoring systems collect data on both outcomes and determinants, so there is discussion of determinants also. We begin with a brief discussion on what we mean by poverty before moving to a comparison of approaches to measuring child poverty in developed and developing countries (parts 3 and 4 respectively). Part 5 concludes.