Founded 1955 - Reestablished 1986 - Affiliated to the Athletic Association of Ireland
St Peter's AC athletes have won four medals in Ireland's premier domestic competition - the BLÉ National Senior Track & Field Championships (up to 1999) and the AAI Senior Track & Field Championships of Ireland (from 2000).
| Year | Venue | Event | Category | Pos. | Athlete | Perf. |
| 2008 | Santry | Javelin | Sen Women | 2nd | Olivia McDonald | 38.81 |
| 2007 | Santry | Javelin | Sen Women | 3rd | Olivia McDonald | 35.23 |
| 2006 | Santry | Javelin | Sen Women | 3rd | Olivia McDonald | 36.55 |
| 1988 | Santry | 400m H | Sen Women | 3rd | Maria Mackin | 1:03.05 |
St Peter's AC athletes have also enjoyed several top three finishes in various national championship competitions over the years. Details of these performances in recent years are shown below.
| Championship | Venue | Event | Category | Pos. | Athlete | Perf. |
| Irish | Tullamore | Javelin | Jun Women | 1st | Olivia McDonald | 38.08 |
| Irish | Tullamore | Javelin | U19 Girls | 1st | Olivia McDonald | 40.70 |
| Irish | Antrim | High J | U15 Girls | 1st | Emily Rogers | 1.50 |
| Irish Indoors | Nenagh | High J | U15 Girls | 1st | Emily Rogers | 1.55 |
| Irish Indoors | Nenagh | High J | U13 Boys | 1st | Mark Rogers | 1.48 |
| Irish Schools | Tullamore | Javelin | Sen Girls | 1st | Olivia McDonald | 38.63 |
| Scottish | Pitreavie | Shot | O45 Men | 1st | John McDonnell | 8.52 |
| Scottish | Pitreavie | Discus | O45 Men | 1st | John McDonnell | 22.70 |
| Irish | Santry | Javelin | Sen Women | 2nd | Olivia McDonald | 38.81 |
| Irish | Tullamore | Javelin | U17 Girls | 2nd | Laura O'Neill | 28.36 |
| Irish Indoors | Nenagh | Long J | U18 Girls | 2nd | Hilary Kerr | 5.13 |
| Irish Indoors | Nenagh | Shot | U18 Girls | 2nd | Frances Rogers | 10.06 |
| Community Games | Mosney | High J | U16 Girls | 2nd | Grace Rogers | 1.50 |
| Scottish | Pitreavie | Shot | O45 Men | 2nd | Tom McGrane | 7.26 |
| Irish | Tullamore | Long J | U18 Girls | 3rd | Hilary Kerr | 5.09 |
| Irish | Tullamore | Shot | U18 Girls | 3rd | Frances Rogers | 9.82 |
| Irish | Antrim | Discus | U18 Girls | 3rd | Frances Rogers | 22.75 |
| Irish | Antrim | High J | U13 Boys | 3rd | Mark Rogers | 1.45 |
| Irish Indoors | Nenagh | Shot | U13 Boys | 3rd | Mark Rogers | 10.07 |
| Irish Schools | Tullamore | Shot | Sen Girls | 3rd | Frances Rogers | 10.06 |
| Championship | Venue | Event | Category | Pos. | Athlete | Perf. |
| Irish | Tullamore | High J | Jun Men | 1st | Kevin McManus | 1.70 |
| Irish | Tullamore | Long J | U17 Girls | 1st | Hilary Kerr | 5.28 |
| Irish | Greystones | Pent | O40 Women | 1st | Maria Duffy | 1622 |
| Irish | Tullamore | Javelin | U18 Girls | 2nd | Olivia McDonald | 34.34 |
| Irish Indoors | Nenagh | Long J | U17 Girls | 2nd | Hilary Kerr | 4.98 |
| Irish Schools | Tullamore | Javelin | Sen Girls | 2nd | Olivia McDonald | 33.46 |
| Irish Schools | Tullamore | Javelin | Jun Girls | 2nd | Laura O'Neill | 29.55 |
| Irish | Santry | Javelin | Sen Women | 3rd | Olivia McDonald | 35.23 |
| Irish | Tullamore | Javelin | Jun Women | 3rd | Olivia McDonald | 34.03 |
| Irish | Tullamore | 4x100m | Jun Women | 3rd | Rosaleen Galligan | 57.22 |
| Emily Kerr | ||||||
| Hilary Kerr | ||||||
| Olivia McDonald | ||||||
| Irish | Tullamore | Javelin | U16 Girls | 3rd | Laura O'Neill | 32.97 |
| Irish Indoors | Nenagh | High J | U17 Boys | 3rd | Kevin McManus | 1.78 |