The Third Sector (TS) springs from the need to generate a new agent between the public and the private sector that could therefore be an entity that represents the citizenry. In Spain, the history of NGOs shows that they have been organizations linked to public power, since their introduction as welfare organizations after the civil war. The objective of this paper is to perform an exhaustive analysis of the communication of the Third Sector in general and, in particular, in the city of Valladolid. We develop a deep analysis of the use of communication made by local organizations. As a methodology, we have used the quantitative research technique. The technique allows us to obtain inferences about the image of non-profit organizations of Valladolid before the citizenry. We have found out that the main source of funding comes from the public sector, which is why the traditional budget management model followed by the Third Sector in Spain persists. In addition, entities have more volunteers than workers and these organizations use new technologies to contact their public, although the surveyed citizens state that they are not receiving messages sent by NGOs, and they consider that they do not effectively manage their communication.