The duo's respective contracts are due to expire next month and neither will be offered a new deal by the Yorkshire outfit.
Defender Overson, 19, has never featured for the Bantams' first team.
Meanwhile, 26-year-old centre-back Williams made 78 appearances for the Valley Parade club.
However, Williams's last game came back in November 2011.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Walsall | 36 | 20 | 8 | 8 | 65 | 41 | 24 | 68 |
| 2 | Bradford CityBradford | 36 | 19 | 9 | 8 | 48 | 30 | 18 | 66 |
| 3 | Doncaster RoversDoncaster | 36 | 18 | 8 | 10 | 53 | 43 | 10 | 62 |
| 4 | AFC Wimbledon | 35 | 17 | 9 | 9 | 46 | 23 | 23 | 60 |
| 5 | Notts County | 35 | 16 | 10 | 9 | 53 | 37 | 16 | 58 |
| 6 | Port Vale | 34 | 15 | 13 | 6 | 43 | 35 | 8 | 58 |
| 7 | Crewe AlexandraCrewe | 36 | 14 | 14 | 8 | 44 | 37 | 7 | 56 |
| 8 | Grimsby Town | 35 | 17 | 5 | 13 | 51 | 51 | 0 | 56 |
| 9 | Colchester UnitedColchester | 35 | 12 | 16 | 7 | 40 | 32 | 8 | 52 |
| 10 | Bromley | 36 | 13 | 12 | 11 | 46 | 43 | 3 | 51 |
| 11 | Salford City | 35 | 13 | 11 | 11 | 43 | 37 | 6 | 50 |
| 12 | Fleetwood TownFleetwood | 36 | 12 | 13 | 11 | 49 | 43 | 6 | 49 |
| 13 | Swindon TownSwindon | 36 | 11 | 13 | 12 | 52 | 52 | 0 | 46 |
| 14 | Cheltenham TownCheltenham | 35 | 12 | 10 | 13 | 46 | 50 | -4 | 46 |
| 15 | Chesterfield | 34 | 12 | 9 | 13 | 52 | 43 | 9 | 45 |
| 16 | BarrowBarrow | 35 | 12 | 7 | 16 | 38 | 41 | -3 | 43 |
| 17 | Newport CountyNewport | 35 | 12 | 7 | 16 | 45 | 56 | -11 | 43 |
| 18 | MK Dons | 35 | 12 | 6 | 17 | 46 | 50 | -4 | 42 |
| 19 | Gillingham | 35 | 11 | 8 | 16 | 30 | 38 | -8 | 41 |
| 20 | Harrogate TownHarrogate | 36 | 11 | 7 | 18 | 29 | 45 | -16 | 40 |
| 21 | Accrington StanleyAccrington | 35 | 9 | 9 | 17 | 39 | 54 | -15 | 36 |
| 22 | Tranmere RoversTranmere | 36 | 7 | 12 | 17 | 27 | 55 | -28 | 33 |
| 23 | Morecambe | 36 | 8 | 5 | 23 | 31 | 54 | -23 | 29 |
| 24 | Carlisle UnitedCarlisle | 35 | 6 | 9 | 20 | 25 | 51 | -26 | 27 |
| > League Two Full Table | |||||||||
