The present work was carried out to study the length-weight relationships and condition factor of the commercial Bartail Flathead (Platycephalus indicus), in Bardawil lagoon, North Sinai, Egypt. Monthly, random samples of Bartail Flathead (Platycephalus indicus) were collected from the mixed catch of the main landing site at the Bardawil lagoon. 947 specimens of Platycephalus indicus varied from 17.9 to 52.1 cm with weights ranging between 27.6 and 1003.7 g. were collected from August to December during two fishing seasons 2019-2020. The length-weight relationship of Platycephalus indicus representing were Male: W= 0.0019 L^3.3502 (R² = 0.9677); Female: W = 0.0018 L^3.3635 (R² = 0.9822) and Combined sexes: W = 0.002 L^3.3402 (R² = 0.9815). The relationship equation showed a positive allometric (b > 3); the value of (b) equals 3.3502, 3.3635 cm and 3.3402 cm for males, females and combined sexes respectively. The condition factor for Platycephalus indicus during the study period was about 0.65 in males, 0.76 in females and 0.76 in combined sexes.