Date of birth
Goalkeeper Ramsdale arrived at the Spireites in January on-loan from Bournemouth until the end of the season.
Ramsdale signed for the Cherries on January 31, 2017 for a reported £800,000 fee from Sheffield United.
He has represented England at U18, U19 and U20 level, winning a combined 17 caps.
Ramsdale started all five games for the England under-19 side that won the 2017 UEFA European Under-19 Championship.