| Tournament details | |
|---|---|
| Country | Republic of Ireland |
| Teams | 42 |
| Final positions | |
| Champions | Derry City |
| Runners-up | St Patrick's Athletic |
| Tournament statistics | |
| Matches played | 49 |
| Goals scored | 134 (2.73 per match) |
The FAI Cup 2006 was the 86th staging of The Football Association of Ireland Challenge Cup or FAI Cup. This season's competition was the last to be sponsored by Carlsberg. It officially kicked off in late April, when twenty clubs from the junior and intermediate leagues battled it out for the chance to face League of Ireland opposition in the second round. The ten winners of those ties were joined in the second round by the 22 League of Ireland clubs. The competition ran until early December, with the final taking place on Sunday, December 3.
Matches played on the weekend of Saturday, 23 April 2006.
| Tie no | Home team | Score | Away team |
|---|---|---|---|
| 1 | Waterford Crystal | 4–1 | Garda AFC |
| 2 | Castlebar Celtic | 5–1 | Fairview CYM |
| 3 | Ashtown Villa | 2–2 | Wayside Celtic |
| 4 | Tolka Rovers | 1–3 | Carrigaline United |
| 5 | College Corinthians | 2–2 | Blarney United |
| 6 | Brendanville | 0–1 | Douglas Hall |
| 7 | Malahide United | 1–1 | Fanad United |
| 8 | Athenry | 0–0 | Bangor Celtic |
| 9 | Killester United | 6–1 | St Mochtas |
| 10 | Crumlin United | 0–0 | Avondale United |
Matches played on the weekend of Sunday, 28 May 2006.
| Tie no | Home team | Score | Away team |
|---|---|---|---|
| 1 | Longford Town | 2–1 | Cork City |
| 2 | Athlone Town | 2–1 | Galway United |
| 3 | Bohemians | 3–1 | Waterford Crystal |
| 4 | Bray Wanderers | 2–2 | Kildare County |
| replay | Kildare County | 0–1 | Bray Wanderers |
| 5 | Waterford United | 5–0 | Douglas Hall |
| 6 | Limerick | 0–0 | Drogheda United |
| replay | Drogheda United | 0–1 | Limerick |
| 7 | Dundalk | 1–0 | Cobh Ramblers |
| 8 | Blarney United | 1–3 | Derry City |
| 9 | Bangor Celtic | 1–3 | Shelbourne |
| 10 | Carrigaline United | 0–4 | Sligo Rovers |
| 11 | Kilkenny City | 0–2 | UCD |
| 12 | Dublin City | 0–0 | Monaghan United |
| replay | Monaghan United | 2–4 | Dublin City |
| 13 | Finn Harps | 1–0 | Crumlin United |
| 14 | Castlebar Celtic | 0–2 | Shamrock Rovers |
| 15 | Malahide United | 0–2 | St Patrick's Athletic |
| 16 | Wayside Celtic | 0–1 | Killester United |
Matches played on the weekend of Sunday, 27 August 2006.
| Tie no | Home team | Score | Away team |
|---|---|---|---|
| 1 | Shamrock Rovers | 1–1 | Bohemians |
| replay | Bohemians | 0–2 | Shamrock Rovers |
| 2 | Waterford United | 1–1 | Longford Town |
| replay | Longford Town | 1–0 | Waterford United |
| 3 | UCD | 3–1 | Limerick |
| 4 | St Patrick's Athletic | 2–0 | Dundalk |
| 5 | Finn Harps | 0–0 | Athlone Town |
| replay | Athlone Town | 3–2 | Finn Harps |
| 6 | Sligo Rovers | 2–1 | Bray Wanderers |
| 7 | Shelbourne | 0–1 | Derry City |
| 8 | Killester United | w/o | Dublin City |
Matches played on the weekend of Sunday, 1 October.
| St Patrick's Athletic | 4–1 | Longford Town |
|---|---|---|
Molloy  3', 61', 78' (pen.)Foley 26' (pen.) | Martin 69' |
| Athlone Town | 1–2 | Shamrock Rovers |
|---|---|---|
| Sheridan 38' | Rowe 82' Clarke 90' |
| Sligo Rovers | 0–0 | Killester United |
|---|---|---|
| Derry City | 2–0 | UCD |
|---|---|---|
| Farren 65' pen McHugh 67' |
| Killester United | 3–4 (a.e.t.) | Sligo Rovers |
|---|---|---|
| Keogh 19', 77' Lacey 51' | Bellew 11' Hughes 44'Peers 67'McTiernan 102' |
| Shamrock Rovers | 0–2 | St Patrick's Athletic |
|---|---|---|
| Keegan 18' Molloy ?' |
| Derry City | 5–0 | Sligo Rovers |
|---|---|---|
| McCourt 33' Farren 39' (pen.), 46'Martyn 42', 90+1' |
The final was the last at the old Lansdowne Road.
| Derry City | 4–3 (a.e.t.) | St Patrick's Athletic |
|---|---|---|
| M. Farren 25' C. Delaney 84'P. Hutton 106'S. Brennan 109' (o.g.) | Report | D. Mulcahy 19' T. Molloy 74' (pen.)S. O'Connor 103' |
| Winner of FAI Cup 2006 |
|---|
Derry City 4th Title |