With 92% of its population living in urban areas, Argentina is one of the most urbanized countries on the planet. Like in many South Countries, the populations of the small and medium-sized cities, which serve as intermediate centers between the countryside and the urban network, are growing steadily. Such cities in Argentina offer services and infrastructures to both urban and rural populations, as well as a residential alternative to the Greater Buenos Aires metropolitan area. These cities, however, are facing specific problems that require appropriate responses. In this respect, Nueve de Julio is emblematic of the challenges facing these intermediate cities. As one of the hundred cities created in the 19th century by the Argentinian government, Nueve de Julio is today a city whose population is increasing, and territory is expanding, but that lacks any foresight to anticipate the next 20 or 30 years. Our purpose is to analyze the reasons of this stagnation, explain the serious development problems the city confronts, with disparities in the organization of its territory and 20% of population living in poverty, and foresee an open system of urban planning, capable to guide the urban authorities and its partners in the identification of priorities and investments in favor of all the inhabitants. The government seems helpless in dealing with this. Political activism prevails over planning and varies from one election to the next depending on the party in power. Means are lacking, both financially and in terms of technical skills. Establishing an open system of urban planning is imperative. Based on the collaboration of citizen, the goals of the planning should include social, economic and spatial integration, efforts to include the city’s poor and more rational, less costly development of the suburban periphery. This will enable Nueve de Julio to better play its role as an intermediate city for the entire urban and regional population with regard to business, administration, education and health services.