Home · By area · Release notes. Enrolment by planning area, local authority, school patron, county.
ST THOMAS SENIOR N S
Roll number: 19765O
Jobstown, Tallaght, Dublin 24
School details
- Address
- Jobstown, Tallaght, Dublin 24 (D24YN90)
- Principal
- Eithne O'Shea
- Ethos
- Catholic
- DEIS
- Y
- Irish classification
- No subjects through Irish
- Gaeltacht
- N
- Island
- N
- Local authority
- South Dublin County Council
- School patron
- Archbishop of Dublin
- School type
- Ordinary with Special Classes
- School level
- Senior
- Planning area
- Tallaght
Preliminary data
The latest year shown (2025/26) is preliminary and subject to revision when the official enrolment figures are released by the Department of Education.
Data highlights
Key numbers to spot outliers or notable changes.
- Biggest gain in a single year: 1993/94: 384 in 1983/84 → 631, +247 pupils.
- Biggest loss in a single year: 1999/00: 512 in 1998/99 → 456, -56 pupils.
- Largest single-class increase: 5th Class in 2023/24 (76 → 98, +22).
- Largest single-class decrease: 6th Class in 2021/22 (109 → 84, -25).
- Largest cohort-step gain: 5th → 6th in 2023/24 (76 → 80, +4).
- Largest cohort-step loss: 5th → 6th in 2021/22 (91 → 84, -7).
- Overall: 384 (1983/84) → 331 (2025/26 (preliminary)), -53.
Summary statistics (class-level data)
Min / max / mean enrolment per class across the available years (2020/21–2024/25; preliminary year excluded from class stats).
| Class |
Min |
Max |
Mean |
Years |
| 3rd Class |
75 |
102 |
88.6 |
5 |
| 4th Class |
78 |
99 |
90.6 |
5 |
| 5th Class |
76 |
98 |
90.0 |
5 |
| 6th Class |
80 |
109 |
91.8 |
5 |
| Total |
331 |
631 |
433.4 |
34 |
Total enrolment over time
Total and gender trends use historical records where available. Class-level data starts in 2020/21.
Enrolment by gender over time
Enrolment by class over time
Raw data by year
Years marked (preliminary) are subject to revision when official data are published.
| Year |
Female |
Male |
JI |
SI |
1st |
2nd |
3rd |
4th |
5th |
6th |
Total |
| 1983/84 |
193 |
191 |
– |
– |
– |
– |
– |
– |
– |
– |
384 |
| 1993/94 |
327 |
304 |
– |
– |
– |
– |
– |
– |
– |
– |
631 |
| 1994/95 |
277 |
337 |
– |
– |
– |
– |
– |
– |
– |
– |
614 |
| 1995/96 |
276 |
314 |
– |
– |
– |
– |
– |
– |
– |
– |
590 |
| 1996/97 |
268 |
320 |
– |
– |
– |
– |
– |
– |
– |
– |
588 |
| 1997/98 |
233 |
311 |
– |
– |
– |
– |
– |
– |
– |
– |
544 |
| 1998/99 |
226 |
286 |
– |
– |
– |
– |
– |
– |
– |
– |
512 |
| 1999/00 |
222 |
234 |
– |
– |
– |
– |
– |
– |
– |
– |
456 |
| 2000/01 |
213 |
216 |
– |
– |
– |
– |
– |
– |
– |
– |
429 |
| 2001/02 |
206 |
202 |
– |
– |
– |
– |
– |
– |
– |
– |
408 |
| 2002/03 |
202 |
198 |
– |
– |
– |
– |
– |
– |
– |
– |
400 |
| 2003/04 |
176 |
198 |
– |
– |
– |
– |
– |
– |
– |
– |
374 |
| 2004/05 |
181 |
183 |
– |
– |
– |
– |
– |
– |
– |
– |
364 |
| 2005/06 |
179 |
190 |
– |
– |
– |
– |
– |
– |
– |
– |
369 |
| 2006/07 |
178 |
206 |
– |
– |
– |
– |
– |
– |
– |
– |
384 |
| 2007/08 |
183 |
208 |
– |
– |
– |
– |
– |
– |
– |
– |
391 |
| 2008/09 |
169 |
221 |
– |
– |
– |
– |
– |
– |
– |
– |
390 |
| 2009/10 |
176 |
229 |
– |
– |
– |
– |
– |
– |
– |
– |
405 |
| 2010/11 |
205 |
221 |
– |
– |
– |
– |
– |
– |
– |
– |
426 |
| 2011/12 |
210 |
242 |
– |
– |
– |
– |
– |
– |
– |
– |
452 |
| 2012/13 |
225 |
236 |
– |
– |
– |
– |
– |
– |
– |
– |
461 |
| 2013/14 |
208 |
248 |
– |
– |
– |
– |
– |
– |
– |
– |
456 |
| 2014/15 |
205 |
241 |
– |
– |
– |
– |
– |
– |
– |
– |
446 |
| 2015/16 |
210 |
232 |
– |
– |
– |
– |
– |
– |
– |
– |
442 |
| 2016/17 |
201 |
231 |
– |
– |
– |
– |
– |
– |
– |
– |
432 |
| 2017/18 |
215 |
213 |
– |
– |
– |
– |
– |
– |
– |
– |
428 |
| 2018/19 |
211 |
212 |
– |
– |
– |
– |
– |
– |
– |
– |
423 |
| 2019/20 |
192 |
207 |
– |
– |
– |
– |
– |
– |
– |
– |
399 |
| 2020/21 |
176 |
200 |
– |
– |
– |
– |
84 |
92 |
91 |
109 |
376 |
| 2021/22 |
163 |
182 |
– |
– |
– |
– |
95 |
78 |
88 |
84 |
345 |
| 2022/23 |
174 |
189 |
– |
– |
– |
– |
102 |
96 |
76 |
89 |
363 |
| 2023/24 |
177 |
187 |
– |
– |
– |
– |
87 |
99 |
98 |
80 |
364 |
| 2024/25 |
186 |
171 |
– |
– |
– |
– |
75 |
88 |
97 |
97 |
357 |
| 2025/26 (preliminary) |
168 |
163 |
– |
– |
– |
– |
– |
– |
– |
– |
331 |