I found an ecovillage in PA, Hundredfold Farm. From their website:
The Hundredfold Farm Cohousing Community is an effort of several families to create a 14-household rural cohousing community in the Gettysburg, Pennsylvania area . The members of this multi-generational community are learning together as they explore the art of living in a sustainable way.
Hundredfold Farm is a collaborative housing project that offers an alternative to alienation and isolation exacerbated by most other housing alternatives. The cohousing model is characterized by private dwellings, clustered housing, pedestrian friendly design, and extensive common facilities. Additionally, cohousing communities are generally funded, designed and managed by the residents.
