Considering that more than half of the world's population lives in urban areas, dealing with the reflexes of urbanization and seeking the sustainable development of cities is one of the great challenges facing governments and society in general. Such is the relevance of the theme that the 2030 Agenda for Sustainable Development foresaw, among 17 sustainable development goals, one specifically linked to the urban issue, namely, the SDG 11- Sustainable Cities and Communities. The development of the work included the implementation of a demonstrative unit of urban agroecology in Campos dos Goytacazes/RJ, between the second half of 2018 and the first quarter of 2021. And it sought, through an exploratory case study and systematization of the experience, to know and make available to the public debate relevant information for the implementation of an urban agroecology unit as an instrument for the sustainable management of the city of Campos dos Goytacazes/RJ. Through articulated action between research, scientific initiation and university extension projects, supported by the municipal agricultural program, practices in food production, composting, educational and dissemination practices were developed, in addition to direct actions in the fight against hunger in the municipality after the start of the Covid-19 pandemic. The knowledge built up during the experience was systematized and made available for public debate through the development of several communication products, such as lectures, dissemination videos, participation in television reports and maintenance of a page on the social network. And as a result of the project, in November/2021 the institution of the first CSA (Community that Sustains Agriculture) in the region began.