The 26-year-old's previous deal was due to expire next summer, but he has now committed to the club until 2018.
Shinnie joined Birmingham from Inverness Caledonian Thistle in 2013 and has scored five goals in 56 appearances since.
He joins Demarai Gray, Clayton Donaldson, Paul Caddis and Jonathan Grounds in signing a new deal at St Andrew's this summer.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| C | Leicester CityLeicester | 45 | 31 | 4 | 10 | 89 | 39 | 50 | 97 |
| 2 | Ipswich TownIpswich | 45 | 27 | 12 | 6 | 90 | 57 | 33 | 93 |
| 3 | Leeds UnitedLeeds | 45 | 27 | 9 | 9 | 80 | 41 | 39 | 90 |
| 4 | Southampton | 45 | 25 | 9 | 11 | 85 | 62 | 23 | 84 |
| 5 | Norwich CityNorwich | 45 | 21 | 10 | 14 | 79 | 63 | 16 | 73 |
| 6 | West Bromwich AlbionWest Brom | 45 | 20 | 12 | 13 | 67 | 47 | 20 | 72 |
| 7 | Hull City | 45 | 19 | 13 | 13 | 68 | 59 | 9 | 70 |
| 8 | Middlesbrough | 45 | 19 | 9 | 17 | 68 | 61 | 7 | 66 |
| 9 | Coventry CityCoventry | 45 | 17 | 13 | 15 | 69 | 57 | 12 | 64 |
| 10 | Preston North EndPreston | 45 | 18 | 9 | 18 | 56 | 64 | -8 | 63 |
| 11 | Bristol City | 45 | 17 | 11 | 17 | 53 | 47 | 6 | 62 |
| 12 | Cardiff CityCardiff | 45 | 19 | 5 | 21 | 51 | 65 | -14 | 62 |
| 13 | Swansea CitySwansea | 45 | 15 | 12 | 18 | 59 | 64 | -5 | 57 |
| 14 | Watford | 45 | 13 | 17 | 15 | 60 | 58 | 2 | 56 |
| 15 | Sunderland | 45 | 16 | 8 | 21 | 52 | 52 | 0 | 56 |
| 16 | Millwall | 45 | 15 | 11 | 19 | 44 | 55 | -11 | 56 |
| 17 | Queens Park RangersQPR | 45 | 14 | 11 | 20 | 45 | 57 | -12 | 53 |
| 18 | Stoke CityStoke | 45 | 14 | 11 | 20 | 45 | 60 | -15 | 53 |
| 19 | Blackburn RoversBlackburn | 45 | 13 | 11 | 21 | 58 | 74 | -16 | 50 |
| 20 | Sheffield WednesdaySheff Weds | 45 | 14 | 8 | 23 | 42 | 68 | -26 | 50 |
| 21 | Plymouth ArgylePlymouth | 45 | 12 | 12 | 21 | 58 | 70 | -12 | 48 |
| 22 | Birmingham CityBirmingham | 45 | 12 | 11 | 22 | 49 | 65 | -16 | 47 |
| 23 | Huddersfield TownHuddersfield | 45 | 9 | 18 | 18 | 48 | 75 | -27 | 45 |
| R | Rotherham UnitedRotherham | 45 | 4 | 12 | 29 | 32 | 87 | -55 | 24 |
| > Championship Full Table | |||||||||
