The 26-year-old, who joined the Bantams from non-league outfit Guiseley in 2009, helped the club to win promotion from League Two last season.
Hanson's previous contract was due to expire in the summer.
Bradford boss Phil Parkinson told BBC Radio Leeds: "I feel it's an important signing for us because he's improving all the time."
Hanson has scored six goals in 20 appearances this season.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| C | Stockport CountyStockport | 46 | 27 | 11 | 8 | 96 | 48 | 48 | 92 |
| P | Wrexham | 46 | 26 | 10 | 10 | 89 | 52 | 37 | 88 |
| P | Mansfield TownMansfield | 46 | 24 | 14 | 8 | 90 | 47 | 43 | 86 |
| 4 | MK Dons | 46 | 23 | 9 | 14 | 83 | 68 | 15 | 78 |
| 5 | Doncaster RoversDoncaster | 46 | 21 | 8 | 17 | 73 | 68 | 5 | 71 |
| 6 | Crewe AlexandraCrewe | 46 | 19 | 14 | 13 | 69 | 65 | 4 | 71 |
| 7 | Crawley TownCrawley | 46 | 21 | 7 | 18 | 73 | 67 | 6 | 70 |
| 8 | BarrowBarrow | 46 | 18 | 15 | 13 | 62 | 56 | 6 | 69 |
| 9 | Bradford CityBradford | 46 | 19 | 12 | 15 | 61 | 59 | 2 | 69 |
| 10 | AFC Wimbledon | 46 | 17 | 14 | 15 | 64 | 51 | 13 | 65 |
| 11 | Walsall | 46 | 18 | 11 | 17 | 69 | 73 | -4 | 65 |
| 12 | Gillingham | 46 | 18 | 10 | 18 | 46 | 57 | -11 | 64 |
| 13 | Harrogate TownHarrogate | 46 | 17 | 12 | 17 | 60 | 69 | -9 | 63 |
| 14 | Notts County | 46 | 18 | 7 | 21 | 89 | 86 | 3 | 61 |
| 15 | Morecambe | 46 | 17 | 10 | 19 | 67 | 81 | -14 | 58 |
| 16 | Tranmere RoversTranmere | 46 | 17 | 6 | 23 | 67 | 70 | -3 | 57 |
| 17 | Accrington StanleyAccrington | 46 | 16 | 9 | 21 | 63 | 71 | -8 | 57 |
| 18 | Newport CountyNewport | 46 | 16 | 7 | 23 | 62 | 76 | -14 | 55 |
| 19 | Swindon TownSwindon | 46 | 14 | 12 | 20 | 77 | 83 | -6 | 54 |
| 20 | Salford City | 46 | 13 | 12 | 21 | 66 | 82 | -16 | 51 |
| 21 | Grimsby Town | 46 | 11 | 16 | 19 | 57 | 74 | -17 | 49 |
| 22 | Colchester UnitedColchester | 46 | 11 | 12 | 23 | 59 | 80 | -21 | 45 |
| R | Sutton UnitedSutton | 46 | 9 | 15 | 22 | 59 | 84 | -25 | 42 |
| R | Forest Green RoversForest Green | 46 | 11 | 9 | 26 | 44 | 78 | -34 | 42 |
| > League Two Full Table | |||||||||
