Urban green spaces (UGS) are thought to impact on health and wellbeing via a range of causal pathways and the ecosystem services they provide have been studied across the social scientific and scientific disciplines. Costeffectiveness analysis (CEA) as practiced in the health and public health sector can help to determine if provision or interventional use of urban green spaces can contribute to population health in a cost effective manner. This mapping review aims to characterise the study designs, independent variables, outcomes and outcome measures reported in existing literature, to gauge the feasibility of performing a cost effectiveness analysis, and guide future research.