The objective of this work is to map the population of Croatian immigrants who settled in the neighborhoods of Mooca de Belém and Brás from 1920 to 1940, through the following: Because these Croatian immigrants mainly resided in these neighborhoods in the capital of São Paulo? To carry out this research, a quali-quanti approach was used, with the use of exploratory research (Bibliographic and documentary research), which had as methodological instruments: Geoprocessing and Descriptive Statistics, which were analyzed from the analysis of the Cluster (Agglomeration) of the locations of Croatian residences. As statistical instruments were used: scatter plot, radar plot, and Pearson coefficient (r). For the analysis, 3 neighborhoods in the city of São Paulo (Mooca, Belém and Brás) were evaluated, associating these 2 methodological instruments mentioned above. It is concluded that the Pearson coefficient between the place of residence of immigrants from Mooca and Belenzinho in relation to social and cultural networks between the years 1920 and 1940 was r = 0.98, ie 98%, with an index of high correlation. They live close to places of work, leisure and culture, and the average distance on foot was 34.25 minutes, which corresponded to 2.95 km. Currently, these 3 neighborhoods do not concentrate (Cluster) anymore the main industrial activities of São Paulo, and these were mostly replaced by parking lots or residential complexes, but a part of the culture of these immigrants remains there, such as the Churches, the Sociedade Amigos da Dalmatia-SADA.