In the first century CE, Philo of Alexandria and Josephus offer vivid descriptions of conflicts between Judeans and Greeks in Greek cities of the Roman Empire over various issues, including the Judeans’ civic identity, the extent of their obligations to local cities and cults, and the potential security threat they posed to those cities. This study analyzes the narratives of these conflicts, investigating what citizenship status Judeans enjoyed, their political influence and whether they enjoyed the right to establish institutions for observing their ancestral worship. For these narratives to be understood properly, it should be assumed that many Judeans were already citizens of their cities, and that this status played a central role in those conflicts.