The 36-year-old had recently been on trial with the League One club following his departure from Olympiacos at the end of last season.
Carroll, who has won 35 caps for Northern Ireland, has made over 400 appearances during his professional career.
Notts County start their League One campaign on Saturday when they make the trip to Preston North End.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Gillingham | 8 | 6 | 1 | 1 | 12 | 2 | 10 | 19 |
| 2 | Walsall | 8 | 6 | 0 | 2 | 15 | 4 | 11 | 18 |
| 3 | BarrowBarrow | 8 | 5 | 1 | 2 | 11 | 5 | 6 | 16 |
| 4 | Notts County | 8 | 4 | 3 | 1 | 15 | 8 | 7 | 15 |
| 5 | Port Vale | 8 | 4 | 2 | 2 | 13 | 11 | 2 | 14 |
| 6 | AFC Wimbledon | 6 | 4 | 1 | 1 | 9 | 4 | 5 | 13 |
| 7 | Doncaster RoversDoncaster | 8 | 4 | 1 | 3 | 11 | 12 | -1 | 13 |
| 8 | Crewe AlexandraCrewe | 8 | 4 | 1 | 3 | 8 | 9 | -1 | 13 |
| 9 | Chesterfield | 8 | 3 | 3 | 2 | 13 | 6 | 7 | 12 |
| 10 | Fleetwood TownFleetwood | 7 | 3 | 3 | 1 | 10 | 7 | 3 | 12 |
| 11 | Grimsby Town | 8 | 4 | 0 | 4 | 12 | 14 | -2 | 12 |
| 12 | Newport CountyNewport | 8 | 4 | 0 | 4 | 12 | 16 | -4 | 12 |
| 13 | Bradford CityBradford | 8 | 3 | 2 | 3 | 10 | 9 | 1 | 11 |
| 14 | Harrogate TownHarrogate | 8 | 3 | 1 | 4 | 8 | 11 | -3 | 10 |
| 15 | Colchester UnitedColchester | 8 | 2 | 3 | 3 | 12 | 14 | -2 | 9 |
| 16 | Salford City | 7 | 2 | 3 | 2 | 4 | 6 | -2 | 9 |
| 17 | Tranmere RoversTranmere | 7 | 2 | 3 | 2 | 3 | 7 | -4 | 9 |
| 18 | Bromley | 8 | 2 | 2 | 4 | 10 | 12 | -2 | 8 |
| 19 | MK Dons | 8 | 2 | 2 | 4 | 7 | 10 | -3 | 8 |
| 20 | Cheltenham TownCheltenham | 8 | 2 | 1 | 5 | 9 | 13 | -4 | 7 |
| 21 | Swindon TownSwindon | 8 | 1 | 3 | 4 | 8 | 12 | -4 | 6 |
| 22 | Carlisle UnitedCarlisle | 8 | 2 | 0 | 6 | 10 | 17 | -7 | 6 |
| 23 | Morecambe | 8 | 0 | 3 | 5 | 6 | 11 | -5 | 3 |
| 24 | Accrington StanleyAccrington | 7 | 0 | 3 | 4 | 8 | 16 | -8 | 3 |
| > League Two Full Table | |||||||||
