Exploring the existence and experience of food insecurity in low-to-middle income Melbourne,Victoria households KLEVESUZANNE 2019 Food insecurity, the limited or uncertain availability of households’ physical, social and economic access to sufficient, nutritious food, affects health. It is determined by a complex interaction of factors, but primarily income and financial constraints. This thesis explored food insecurity in low-to-middle income (A$40,000-$80,000) Melbourne households. The mixed methods research involved analysis of population health data and qualitative interviews identifying that food insecurity exists in these Australian households. The experience of food insecurity varied in duration, with differing severity and consequences. The findings progress the understanding of this complex issue informing public health policy and practice responses.