Known for his athleticism and shot-stopping ability, 24-year-old Meslier has been a model of consistency throughout a season in which Leeds challenged for automatic promotion.
He has split his clean sheets evenly between home and away games this season with nine of them coming away from Elland Road.
Meslier played for French club FC Lorient in his native Brittany before initially joining Leeds on loan as a teenager in August 2019.
He made the move permanent the following summer and has now made 161 league appearances for the Yorkshire side.