This paper focuses on groups of Romans and Italians attested outside Italy, in all parts of the Roman oecumene, from the Iberian Peninsula and Britain to Asia Minor and the eastern frontier in Syria as well as from the Rhine and Danube to northern Africa. Groups of Romans and Italians are attested at different times in various places, in towns of varying legal status, of various size and importance, even in villages or settlements next to camps of legions. The duration of their presence and the terms adopted for their (self-)definition also display a certain variety. Out of an abundant source material and numerous local particularities that require a closer examination, I will attempt to focus on those data that could elucidate the nature, the legal status, and the organizationof these groups. Taking all this into account, I will reassess the possibility to classify groups of Romans and Italians abroad as private associations, as they are often mentioned in the related bibliography, the term used either consciously or just with the intentionto show that these groups were clearly visible and identifiable in the host-societies.