In theory, ecological citizenship (EC) has been suggested as a driver of individual pro-environmental behaviour (PEB), providing a more stable foundation for lifestyle changes than reliance on external policy tools. The relevance of EC for explaining PEB is tested by applying data from a Swedish survey designed to capture various aspects of EC. A significant proportion of Swedes fulfil the values-based requirements of ecological citizenship, as outlined in EC-theory. Furthermore, individuals who think along the lines of EC are more likely than others to behave in an environmentally friendly manner in their day-to-day activities. Certain aspects of EC are more important for PEB than others, which implies the need for further theoretical development of EC theory