Data on one hundred and three ostracod species belonging to forty-one genera from the middle Eocene sediments of Egypt have been subjected to appropriate multivariate data analyses techniques in order to reconstruct the paleoenvironment. The most common ostracod species of the studied regions belong to the genera: Cytherella, Paracosta, Bairdia and Reticulina (these species represent more than 32% of the total number of the studied ostracod species). Cluster analysis based on the neighbour joining clustering method (Jukes-Cantor similarity measure) of eleven rock units and fifty ostracod species suggested the separation of these rock units according to their ages under the control of their geographical distribution within the studied regions. On the other hand, Factor Analysis (based on the varimax rotation technique) of the same data matrix aided to detect four paleoenvironmental factors affected the distribution of the ostracod assemblages. The first factor discloses the turbulence of water; the second factor corresponds to the degree of salinity of water; the third factor signifies the water depth associated with oscillation in the oxygen content; the fourth factor demonstrates the temperature of water in the euphotic zone exposure to water depth. Moreover, ten ostracod biofacies with specific paleoenvironmental conditions were recognized. Outstandingly, it seems prominently that paleoenvironmental changes had shaped the distribution of the middle Eocene ostracods of Egypt rather than origination or extinction.