Home · By area · Release notes. Enrolment by planning area, local authority, school patron, county.
ST HELENS SENIOR N S
Roll number: 19762I
Limetree Ave, Portmarnock, Co. Dublin
School details
- Address
- Limetree Ave, Portmarnock, Co. Dublin (D13X326)
- Principal
- Gwyn Bhreathnach
- Ethos
- Catholic
- DEIS
- N
- Irish classification
- No subjects through Irish
- Gaeltacht
- N
- Island
- N
- Local authority
- Fingal County Council
- School patron
- Archbishop of Dublin
- School type
- Ordinary with Special Classes
- School level
- Senior
- Planning area
- Portmarnock
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: 354 in 1983/84 → 492, +138 pupils.
- Biggest loss in a single year: 1994/95: 492 in 1993/94 → 435, -57 pupils.
- Largest single-class increase: 5th Class in 2022/23 (87 → 106, +19).
- Largest single-class decrease: 3rd Class in 2021/22 (102 → 84, -18).
- Largest cohort-step gain: 5th → 6th in 2024/25 (89 → 96, +7).
- Largest cohort-step loss: 5th → 6th in 2023/24 (106 → 101, -5).
- Overall: 129 (1981/82) → 381 (2025/26 (preliminary)), 252.
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 |
77 |
102 |
88.2 |
5 |
| 4th Class |
86 |
103 |
92.6 |
5 |
| 5th Class |
86 |
106 |
91.6 |
5 |
| 6th Class |
83 |
101 |
92.6 |
5 |
| Total |
129 |
492 |
306.1 |
36 |
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 |
| 1981/82 |
66 |
63 |
– |
– |
– |
– |
– |
– |
– |
– |
129 |
| 1982/83 |
115 |
119 |
– |
– |
– |
– |
– |
– |
– |
– |
234 |
| 1983/84 |
175 |
179 |
– |
– |
– |
– |
– |
– |
– |
– |
354 |
| 1993/94 |
215 |
277 |
– |
– |
– |
– |
– |
– |
– |
– |
492 |
| 1994/95 |
193 |
242 |
– |
– |
– |
– |
– |
– |
– |
– |
435 |
| 1995/96 |
177 |
217 |
– |
– |
– |
– |
– |
– |
– |
– |
394 |
| 1996/97 |
162 |
205 |
– |
– |
– |
– |
– |
– |
– |
– |
367 |
| 1997/98 |
150 |
182 |
– |
– |
– |
– |
– |
– |
– |
– |
332 |
| 1998/99 |
143 |
166 |
– |
– |
– |
– |
– |
– |
– |
– |
309 |
| 1999/00 |
136 |
165 |
– |
– |
– |
– |
– |
– |
– |
– |
301 |
| 2000/01 |
130 |
169 |
– |
– |
– |
– |
– |
– |
– |
– |
299 |
| 2001/02 |
138 |
164 |
– |
– |
– |
– |
– |
– |
– |
– |
302 |
| 2002/03 |
138 |
163 |
– |
– |
– |
– |
– |
– |
– |
– |
301 |
| 2003/04 |
129 |
152 |
– |
– |
– |
– |
– |
– |
– |
– |
281 |
| 2004/05 |
140 |
138 |
– |
– |
– |
– |
– |
– |
– |
– |
278 |
| 2005/06 |
144 |
143 |
– |
– |
– |
– |
– |
– |
– |
– |
287 |
| 2006/07 |
129 |
144 |
– |
– |
– |
– |
– |
– |
– |
– |
273 |
| 2007/08 |
130 |
140 |
– |
– |
– |
– |
– |
– |
– |
– |
270 |
| 2008/09 |
112 |
136 |
– |
– |
– |
– |
– |
– |
– |
– |
248 |
| 2009/10 |
106 |
118 |
– |
– |
– |
– |
– |
– |
– |
– |
224 |
| 2010/11 |
104 |
122 |
– |
– |
– |
– |
– |
– |
– |
– |
226 |
| 2011/12 |
103 |
121 |
– |
– |
– |
– |
– |
– |
– |
– |
224 |
| 2012/13 |
102 |
124 |
– |
– |
– |
– |
– |
– |
– |
– |
226 |
| 2013/14 |
113 |
121 |
– |
– |
– |
– |
– |
– |
– |
– |
234 |
| 2014/15 |
119 |
125 |
– |
– |
– |
– |
– |
– |
– |
– |
244 |
| 2015/16 |
132 |
135 |
– |
– |
– |
– |
– |
– |
– |
– |
267 |
| 2016/17 |
143 |
145 |
– |
– |
– |
– |
– |
– |
– |
– |
288 |
| 2017/18 |
143 |
169 |
– |
– |
– |
– |
– |
– |
– |
– |
312 |
| 2018/19 |
147 |
179 |
– |
– |
– |
– |
– |
– |
– |
– |
326 |
| 2019/20 |
157 |
174 |
– |
– |
– |
– |
– |
– |
– |
– |
331 |
| 2020/21 |
164 |
193 |
– |
– |
– |
– |
102 |
86 |
86 |
83 |
357 |
| 2021/22 |
176 |
190 |
– |
– |
– |
– |
84 |
103 |
87 |
92 |
366 |
| 2022/23 |
187 |
188 |
– |
– |
– |
– |
86 |
88 |
106 |
91 |
375 |
| 2023/24 |
180 |
203 |
– |
– |
– |
– |
92 |
90 |
89 |
101 |
383 |
| 2024/25 |
175 |
196 |
– |
– |
– |
– |
77 |
96 |
90 |
96 |
371 |
| 2025/26 (preliminary) |
187 |
194 |
– |
– |
– |
– |
– |
– |
– |
– |
381 |