The League Two outfit released a short statement claiming that the 47-year-old has been "relieved of his duties" with immediate effect.
There was pressure on Sheridan's position at the club after they succumbed to relegation from League One at the end of last season.
The Spireites currently sit in 18th position in the table after three games, which accumulated into two draws and one defeat.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Port Vale | 17 | 10 | 4 | 3 | 25 | 17 | 8 | 34 |
| 2 | Walsall | 16 | 9 | 4 | 3 | 30 | 17 | 13 | 31 |
| 3 | Crewe AlexandraCrewe | 16 | 8 | 5 | 3 | 20 | 14 | 6 | 29 |
| 4 | Doncaster RoversDoncaster | 17 | 8 | 5 | 4 | 22 | 18 | 4 | 29 |
| 5 | Notts County | 17 | 7 | 7 | 3 | 23 | 15 | 8 | 28 |
| 6 | MK Dons | 16 | 8 | 3 | 5 | 27 | 19 | 8 | 27 |
| 7 | AFC Wimbledon | 16 | 8 | 2 | 6 | 25 | 14 | 11 | 26 |
| 8 | Chesterfield | 17 | 6 | 7 | 4 | 30 | 20 | 10 | 25 |
| 9 | Grimsby Town | 17 | 8 | 1 | 8 | 19 | 26 | -7 | 25 |
| 10 | Bradford CityBradford | 16 | 6 | 5 | 5 | 21 | 17 | 4 | 23 |
| 11 | Gillingham | 16 | 7 | 2 | 7 | 17 | 14 | 3 | 23 |
| 12 | BarrowBarrow | 17 | 6 | 4 | 7 | 17 | 16 | 1 | 22 |
| 13 | Fleetwood TownFleetwood | 14 | 5 | 6 | 3 | 20 | 15 | 5 | 21 |
| 14 | Cheltenham TownCheltenham | 17 | 6 | 3 | 8 | 22 | 25 | -3 | 21 |
| 15 | Salford City | 16 | 5 | 6 | 5 | 15 | 18 | -3 | 21 |
| 16 | Newport CountyNewport | 17 | 6 | 3 | 8 | 19 | 26 | -7 | 21 |
| 17 | Harrogate TownHarrogate | 17 | 6 | 3 | 8 | 16 | 23 | -7 | 21 |
| 18 | Accrington StanleyAccrington | 16 | 4 | 6 | 6 | 22 | 26 | -4 | 18 |
| 19 | Bromley | 16 | 3 | 8 | 5 | 19 | 21 | -2 | 17 |
| 20 | Colchester UnitedColchester | 16 | 3 | 8 | 5 | 19 | 22 | -3 | 17 |
| 21 | Tranmere RoversTranmere | 16 | 4 | 5 | 7 | 10 | 20 | -10 | 17 |
| 22 | Swindon TownSwindon | 17 | 2 | 7 | 8 | 20 | 28 | -8 | 13 |
| 23 | Morecambe | 17 | 3 | 4 | 10 | 17 | 29 | -12 | 13 |
| 24 | Carlisle UnitedCarlisle | 17 | 3 | 4 | 10 | 14 | 29 | -15 | 13 |
| > League Two Full Table | |||||||||
