In this paper, we undertake the first examination of the effects of personality on individual economic choices over public environmental goods, using a stated preference approach. Based on three data sets from three separate choice modelling studies, we examine the effects of personality on preferences for the status quo, for changes in environmental quality, and over the costs of investing in environmental improvement. Using a hybrid choice framework, we show that incorporating personality research into economic models can provide valuable behavioural insights, enriching explanations of why the demand for environmental goods varies across people.