Their first admission to the Football League in 1899 .
Chesterfield have spent 20 seasons in the second tier of the English football league system , 55 in the third , 25 in the fourth and 8 in non-league football .
Since their first admission to the Football League in 1899 , Chesterfield have spent 20 seasons in the second tier of the English football league system , 55 in the third , 25 in the fourth and 8 in non-league football .