Grennan College
Grennan College is a secondary school in Kilkenny. 334 pupils, Multi-denominational ethos, 2 special classes, DEIS.
The facts
| Type | Secondary school |
|---|---|
| Gender | Mixed |
| Ethos | Multi-denominational |
| Patron | Kilkenny & Carlow ETB |
| Fees | Free |
| Enrolment | 334 (187 boys, 147 girls) 2025/26 |
| Language of instruction | English Medium School |
| DEIS | Yes — this school is in the DEIS programme |
| Roll number | 70640I |
| Eircode | R95T959 |
| Address | Ladywell St, Thomastown, Co Kilkenny |
Special classes
2 special classes sanctioned for 26/27:
- 2 × Autism/Autistic Spectrum Disorders
Source: National Council for Special Education. Children in a special class travel under a separate transport scheme with its own rules.
The area around this school
School planning area: Thomastown. This is how the Department plans where to build capacity. It is not a catchment.
Local house prices: the median residential sale price in Eircode district R95 (Kilkenny) was €350,000 in 2025. That is up 62.8% since 2020. CSO figures for the whole district, not the streets beside the school.
Area profile: the Pobal HP Deprivation Index rates Thomastown at -0.28 (Marginally Below Average), where 0 is the national average. 39% of adults there hold a third-level qualification.
Contact
| Principal | Sean Og O'Sullivan |
|---|---|
| Phone | 0567724112 |
| info@grennancollege.ie | |
| Local authority | Kilkenny County Council |
Other schools in Thomastown
- S N Cholmcille Primary school, Kilkenny
- St Mary's National School Primary school, Kilkenny
How we know
DoE Schools GIS 2026 (CC BY 4.0) — checked 2026-08-27.