This study deals with information about the reproductive biology of the golden grey mullet, Liza aurata from Bardawil Lagoon, North Sinai, Egypt. Monthly random samples of Liza aurata were collected from the commercial catch in different landing sites of the Bardawil Lagoon during one fishing season from May 2017 to February 2018. Sex ratio, length at first maturity (Lm), and gonado-somatic index (GSI) were addressed.  During the whole period of the current study, the sex ratio showed that the females (F) outnumbered the males (M) (1M: 1.5F). The GSI was found to be greatest from November to January and reached its highest value in December, considering that Liza aurata is a winter spawner. The Lm was determined as 20.0 cm for females and males. The length at first capture (Lc) was estimated to be 19.5 cm. It is essential to maximize length at first capture larger than a length at first sexual maturity (> 20.0 cm) . This can be achieved by widening the mesh size used to catch Liza aurata to permit the fish to breed, recruit and maintain the stock of this fish.