The use of pasture-based systems for poultry production is growing due to consumer demand for specialty ‘natural’ and ‘welfare-friendly’ meat and eggs. This paper discusses the various meanings of the term ‘pastured poultry’ and defines the different pasture-based poultry production systems. Considerations of poultry welfare standards provided through the specific system are also discussed. Production topics such as poultry genetics, outdoor access and pasture management are presented together with potential problems. Finally, various aspects of sustainability are analysed to estimate the environmental, economical and social benefits promoted by the pasture-based poultry production systems.