Sustainable agriculture is consistent with the concept of sustainable development, which focuses on economic development as distinct from economic growth. Economic growth requires an increase in output. Economic development can be achieved by increasing the quality of inputs and/or outputs without expanded output. Sustainable agriculture provides adequate food output, although perhaps not increased output, while meeting several societal objectives, such as environmental quality, viable rural communities and enhanced farm family lifestyles. This paper addresses economic development, but not necessarily economic growth, of Maine agriculture.