An ecovillage is a traditional or intentional community with the goal of becoming more socially, culturally, economically, and/or ecologically sustainable. An ecovillage strives to produce the least possible negative impact on the natural environment through intentional physical design and resident behavior choices. It is consciously designed through locally owned, participatory processes to regenerate and restore its social and natural environments. Most range from a population of 50 to 250 individuals, although some are smaller, and traditional ecovillages are often much larger. Larger ecovillages often exist as networks of smaller sub-communities. Some ecovillages have grown through like-minded individuals, families, or other small groups—who are not members, at least at the outset—settling on the ecovillage's periphery and participating de facto in the community. There are currently more than 10,000 ecovillages around the world.

An intentional community is a voluntary residential community which is designed to have a high degree of social cohesion and teamwork. The members of an intentional community typically hold a common social, political, religious, or spiritual vision, and typically share responsibilities and property. This way of life is sometimes characterized as an "alternative lifestyle". Intentional communities can be seen as social experiments or communal experiments. The multitude of intentional communities includes collective households, cohousing communities, coliving, ecovillages, monasteries, survivalist retreats, kibbutzim, Hutterites, ashrams, and housing cooperatives.