This research concerns the relations between the community of metropolitan area of Warsaw, their character and influence. The article is focused on cooperation between the units of area, which is considered to play an essential role in the process of integration. The attempt has been made to estimate the scale and range of integration on metropolitan area. The research is based on surveys (questionnaires) answered by the local authorities of metropolitan area`s community. the analysis covers different partners, cooperation between them, as well as its aims and results. One of the major outcomes of the research is a map describing the network of interrelations. different zones of integration together with passive and active connections were identified on the basis of directions and intensity of cooperation.