A study was conducted to estimate the carapace width (CW)-total body weight (TBW), CW-carapace length (CL) and CW-carapace depth (CD) relationships, sex ratio (SR) and relative condition factor (Kn) of the blue swimming crab Portunus pelagicus (Linnaeus, 1758) caught in the municipal waters of Tolosa, Leyte, Eastern Visayas, Philippines. Based on the carapace width and weight data, both female and male P. pelagicus exhibited a positive allometric growth pattern (b>3). The sex ratio of males and females was 1:2.32, where the number of females was significantly higher than males. The SR suggests that the catch of entangling nets during the sampling period was female-favored. On the other hand, a good state of well-being is suggested for both sexes given the Kn values of more than 1. The results of this study may serve as baseline information that could be helpful in the assessment of the current status of the P. pelagicus stock in the area. The morphometric characteristics and relationships may also serve as references in the field of fishing gear technology, particularly in the development or improvement of fishing gear design suited to the local stock of P. pelagicus in specific fishing areas.