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 | 10 | 6 | 1 | 3 | 19 | 12 | 7 | 19 |
| 2 | Gillingham | 10 | 6 | 1 | 3 | 12 | 5 | 7 | 19 |
| 3 | BarrowBarrow | 10 | 6 | 1 | 3 | 13 | 7 | 6 | 19 |
| 4 | Doncaster RoversDoncaster | 10 | 6 | 1 | 3 | 15 | 12 | 3 | 19 |
| 5 | Notts County | 10 | 5 | 3 | 2 | 17 | 9 | 8 | 18 |
| 6 | Port Vale | 10 | 5 | 3 | 2 | 15 | 12 | 3 | 18 |
| 7 | Fleetwood TownFleetwood | 9 | 4 | 4 | 1 | 16 | 9 | 7 | 16 |
| 8 | Crewe AlexandraCrewe | 9 | 5 | 1 | 3 | 10 | 9 | 1 | 16 |
| 9 | Newport CountyNewport | 9 | 5 | 0 | 4 | 15 | 17 | -2 | 15 |
| 10 | Grimsby Town | 10 | 5 | 0 | 5 | 13 | 17 | -4 | 15 |
| 11 | Chesterfield | 10 | 3 | 5 | 2 | 17 | 10 | 7 | 14 |
| 12 | AFC Wimbledon | 7 | 4 | 1 | 2 | 9 | 5 | 4 | 13 |
| 13 | MK Dons | 10 | 3 | 3 | 4 | 13 | 12 | 1 | 12 |
| 14 | Bradford CityBradford | 9 | 3 | 3 | 3 | 11 | 10 | 1 | 12 |
| 15 | Salford City | 9 | 3 | 3 | 3 | 6 | 9 | -3 | 12 |
| 16 | Colchester UnitedColchester | 10 | 2 | 5 | 3 | 13 | 15 | -2 | 11 |
| 17 | Tranmere RoversTranmere | 9 | 2 | 5 | 2 | 5 | 9 | -4 | 11 |
| 18 | Harrogate TownHarrogate | 10 | 3 | 2 | 5 | 9 | 16 | -7 | 11 |
| 19 | Bromley | 10 | 2 | 4 | 4 | 12 | 14 | -2 | 10 |
| 20 | Cheltenham TownCheltenham | 10 | 3 | 1 | 6 | 12 | 16 | -4 | 10 |
| 21 | Swindon TownSwindon | 10 | 1 | 5 | 4 | 9 | 13 | -4 | 8 |
| 22 | Carlisle UnitedCarlisle | 10 | 2 | 1 | 7 | 10 | 19 | -9 | 7 |
| 23 | Accrington StanleyAccrington | 9 | 1 | 3 | 5 | 11 | 19 | -8 | 6 |
| 24 | Morecambe | 10 | 0 | 4 | 6 | 8 | 14 | -6 | 4 |
| > League Two Full Table | |||||||||
