ECO City Farms | 291 followers on LinkedIn. ECO City Farms is an educational, not-for-profit enterprise located inside the Capital Beltway in Prince George’s County, MD designed to serve as a prototype for sustainable local farming. We grow great food, farms and farmers. We envision a just, vigorous and sustainable food system in the Chesapeake foodshed with ample fertile soil, quality environments and sustainable incomes for farmers, and access to nutritious high quality food for all.