Largest Schools in Hertfordshire (2025)

Schools with the most pupils on roll. Ranked by the Success Index (England) from official English data; 100 schools in Hertfordshire, East of England. Rank positions shown on each profile are within England and East of England.

#	School	Sector	Pupils	Success Index (England)	Key result	Students
1	Sandringham School St Albans · Secondary · Ages 11–18	Academy	1,777	94.4 Top 5%	65.1 Attainment 8	1,777
2	Beaumont School St Albans · Secondary · Ages 11–18	Academy	1,722	93.1 Top 5%	62.6 Attainment 8	1,722
3	Queens' School Bushey · Secondary · Ages 11–18	Academy	1,697	88.9 Top 10%	57.5 Attainment 8	1,697
4	The Saint John Henry Newman Catholic School Stevenage · Secondary · Ages 11–18	Academy	1,620	86.8 Top 10%	57.9 Attainment 8	1,620
5	Simon Balle All-Through School Hertford · All-through · Ages 4–18	Academy	1,617	90.3 Top 10%	55.4 Attainment 8	1,617
6	Tring School Tring · Secondary · Ages 11–18	Academy	1,599	75.2 Top 25%	50.5 Attainment 8	1,599
7	Watford Grammar School for Boys Watford · Secondary · Ages 11–18	Academy	1,590	94.3 Top 5%	68.9 Attainment 8	1,590
8	St Clement Danes School Rickmansworth · Secondary · Ages 11–18	Academy	1,585	95.1 Top 5%	65.1 Attainment 8	1,585
9	Samuel Ryder Academy St Albans · All-through · Ages 4–19	Academy	1,577	84.3 Top 25%	56.5 Attainment 8	1,577
10	Rickmansworth School Rickmansworth · Secondary · Ages 11–18	Academy	1,575	90.5 Top 10%	61.2 Attainment 8	1,575
11	Goffs Academy Waltham Cross · Secondary · Ages 11–18	Academy	1,574	66.7 Top 50%	49.1 Attainment 8	1,574
12	Ashlyns School Berkhamsted · Secondary · Ages 11–18	Local authority	1,561	87.5 Top 10%	57.9 Attainment 8	1,561
13	The Chauncy School Ware · Secondary · Ages 11–18	Academy	1,515	68.0 Top 50%	49.5 Attainment 8	1,515
14	The Hertfordshire & Essex High School and Science College Bishop's Stortford · Secondary · Ages 11–18	Academy	1,508	93.5 Top 5%	63.6 Attainment 8	1,508
15	Parmiter's School Watford · Secondary · Ages 11–18	Academy	1,496	94.2 Top 5%	66.5 Attainment 8	1,496
16	The Nobel School Stevenage · Secondary · Ages 11–18	Local authority	1,475	65.3 Top 50%	50.2 Attainment 8	1,475
17	Dame Alice Owen's School Potters Bar · Secondary · Ages 11–18	Academy	1,467	97.4 Top 5%	72.9 Attainment 8	1,467
18	Leventhorpe Sawbridgeworth · Secondary · Ages 11–18	Academy	1,463	67.4 Top 50%	49.6 Attainment 8	1,463
19	The Broxbourne School Broxbourne · Secondary · Ages 11–18	Academy	1,442	85.9 Top 10%	55.4 Attainment 8	1,442
20	Monk's Walk School Welwyn Garden City · Secondary · Ages 11–18	Academy	1,440	72.8 Top 25%	50.8 Attainment 8	1,440
21	Berkhamsted School Berkhamsted · Secondary · Ages 11–19	Independent	1,439	20.0 Lower 50%	12.2 Attainment 8	1,439
22	Longdean School Hemel Hempstead · Secondary · Ages 11–18	Academy	1,436	38.6 Lower 50%	42.4 Attainment 8	1,436
23	Haberdashers' Boys' School Elstree · All-through · Ages 4–18	Independent	1,429	36.8 Lower 50%	41.0 Attainment 8	1,429
24	Watford Grammar School for Girls Watford · Secondary · Ages 11–19	Academy	1,427	93.9 Top 5%	68.2 Attainment 8	1,427
25	St Albans Girls' School St Albans · Secondary · Ages 11–18	Academy	1,423	89.2 Top 10%	58.8 Attainment 8	1,423
26	Roundwood Park School Harpenden · Secondary · Ages 11–18	Academy	1,421	90.6 Top 10%	59.5 Attainment 8	1,421
27	Birchwood High School Bishop's Stortford · Secondary · Ages 11–18	Academy	1,417	56.0 Top 50%	46.1 Attainment 8	1,417
28	Marriotts School Stevenage · Secondary · Ages 11–18	Local authority	1,415	43.7 Lower 50%	42.4 Attainment 8	1,415
29	The Knights Templar School Baldock · Secondary · Ages 11–18	Academy	1,375	62.5 Top 50%	48.5 Attainment 8	1,375
30	Sir John Lawes School Harpenden · Secondary · Ages 11–18	Academy	1,373	93.1 Top 5%	62.8 Attainment 8	1,373
31	Hitchin Boys' School Hitchin · Secondary · Ages 11–18	Academy	1,364	87.2 Top 10%	57.1 Attainment 8	1,364
32	Hitchin Girls' School Hitchin · Secondary · Ages 11–18	Academy	1,357	89.2 Top 10%	57.8 Attainment 8	1,357
33	St George's School Harpenden · Secondary · Ages 11–18	Academy	1,351	94.6 Top 5%	63.7 Attainment 8	1,351
34	The Marlborough Science Academy St Albans · Secondary · Ages 11–18	Academy	1,337	43.5 Lower 50%	43.4 Attainment 8	1,337
35	Westfield Academy Watford · Secondary · Ages 11–18	Academy	1,331	41.2 Lower 50%	41.4 Attainment 8	1,331
36	Stanborough School Welwyn Garden City · Secondary · Ages 11–18	Academy	1,287	67.6 Top 50%	47.9 Attainment 8	1,287
37	The Hemel Hempstead School Hemel Hempstead · Secondary · Ages 11–18	Academy	1,287	67.1 Top 50%	49.9 Attainment 8	1,287
38	The Bishop's Stortford High School Bishop's Stortford · Secondary · Ages 11–18	Local authority	1,279	88.1 Top 10%	60.2 Attainment 8	1,279
39	Barnwell School Stevenage · Secondary · Ages 11–18	Local authority	1,270	35.9 Lower 50%	41.5 Attainment 8	1,270
40	Chancellor's School Hatfield · Secondary · Ages 11–18	Academy	1,241	65.6 Top 50%	47.6 Attainment 8	1,241
41	Bishop's Stortford College Bishop's Stortford · All-through · Ages 3–18	Independent	1,241	21.8 Lower 50%	23.4 Attainment 8	1,241
42	The Priory School Hitchin · Secondary · Ages 11–18	Local authority	1,221	62.9 Top 50%	48.5 Attainment 8	1,221
43	Richard Hale School Hertford · Secondary · Ages 11–18	Academy	1,207	84.0 Top 25%	56.3 Attainment 8	1,207
44	Bushey Meads School Bushey · Secondary · Ages 11–18	Academy	1,200	44.0 Lower 50%	43.6 Attainment 8	1,200
45	Saint Joan of Arc Catholic School Rickmansworth · Secondary · Ages 11–18	Academy	1,198	73.5 Top 25%	50.6 Attainment 8	1,198
46	Presdales School Ware · Secondary · Ages 11–18	Academy	1,167	88.7 Top 10%	58.9 Attainment 8	1,167
47	Hertswood Academy Borehamwood · Secondary · Ages 11–18	Academy	1,144	29.1 Lower 50%	38.3 Attainment 8	1,144
48	Nicholas Breakspear Catholic School St Albans · Secondary · Ages 11–18	Academy	1,134	84.4 Top 25%	56.4 Attainment 8	1,134
49	Saint Michael's Catholic High School Watford · Secondary · Ages 11–18	Academy	1,130	72.9 Top 25%	50.9 Attainment 8	1,130
50	Kings Langley School Kings Langley · Secondary · Ages 11–18	Academy	1,122	65.8 Top 50%	48.6 Attainment 8	1,122
51	Haberdashers' Girls' School Borehamwood · All-through · Ages 4–18	Independent	1,118	34.6 Lower 50%	39.9 Attainment 8	1,118
52	Katherine Warington School Harpenden · Secondary · Ages 11–19	Academy	1,113	84.2 Top 25%	54.8 Attainment 8	1,113
53	St Mary's Catholic School Bishop's Stortford · Secondary · Ages 11–18	Academy	1,106	80.5 Top 25%	57.6 Attainment 8	1,106
54	St Albans High School for Girls St Albans · All-through · Ages 4–18	Independent	1,106	55.2 Top 50%	48.5 Attainment 8	1,106
55	Yavneh College Borehamwood · Secondary · Ages 11–18	Academy	1,085	93.7 Top 5%	61.6 Attainment 8	1,085
56	John F Kennedy Catholic School Hemel Hempstead · Secondary · Ages 11–18	Academy	1,073	65.7 Top 50%	47.9 Attainment 8	1,073
57	Future Academies Watford Watford · Secondary · Ages 11–18	Academy	1,060	29.2 Lower 50%	39.8 Attainment 8	1,060
58	Merchant Taylors' School Northwood · Secondary · Ages 11–18	Independent	1,051	22.3 Lower 50%	21.7 Attainment 8	1,051
59	Freman College Buntingford · Secondary · Ages 13–18	Academy	1,049	78.3 Top 25%	53.1 Attainment 8	1,049
60	Croxley Danes School Rickmansworth · Secondary · Ages 11–18	Academy	1,049	69.1 Top 50%	51.3 Attainment 8	1,049
61	Barclay Academy Stevenage · Secondary · Ages 11–18	Academy	1,044	66.9 Top 50%	49.5 Attainment 8	1,044
62	Haileybury Turnford Waltham Cross · Secondary · Ages 11–18	Academy	1,021	35.2 Lower 50%	43.3 Attainment 8	1,021
63	Verulam School St Albans · Secondary · Ages 11–18	Academy	987	73.7 Top 25%	52.5 Attainment 8	987
64	The Thomas Alleyne Academy Stevenage · Secondary · Ages 11–18	Academy	970	59.9 Top 50%	48.0 Attainment 8	970
65	Loreto College St Albans · Secondary · Ages 11–18	Academy	952	80.4 Top 25%	58.3 Attainment 8	952
66	King James Academy Royston Royston · All-through · Ages 9–18	Academy	947	31.6 Lower 50%	40.3 Attainment 8	947
67	Bishop's Hatfield Girls' School Hatfield · Secondary · Ages 11–18	Academy	942	74.9 Top 25%	51.9 Attainment 8	942
68	The Highfield School Letchworth Garden City · Secondary · Ages 11–18	Academy	937	41.7 Lower 50%	41.7 Attainment 8	937
69	The Grange Academy Bushey · Secondary · Ages 11–18	Academy	928	38.2 Lower 50%	41.3 Attainment 8	928
70	Haileybury College Hertford · Secondary · Ages 11–18	Independent	924	20.2 Lower 50%	14.5 Attainment 8	924
71	The Astley Cooper School Hemel Hempstead · Secondary · Ages 11–18	Local authority	914	19.0 Lower 50%	34.7 Attainment 8	914
72	St Mary's Church of England High School (VA) Waltham Cross · Secondary · Ages 11–19	Academy	911	43.1 Lower 50%	45.0 Attainment 8	911
73	Hockerill Anglo-European College Bishop's Stortford · Secondary · Ages 11–18	Academy	903	94.1 Top 5%	61.7 Attainment 8	903
74	St Albans School St Albans · Secondary · Ages 11–19	Independent	883	19.8 Lower 50%	10.1 Attainment 8	883
75	Royal Masonic School for Girls Rickmansworth · All-through · Ages 2–19	Independent	880	92.3 Top 10%	66.2 Attainment 8	880
76	Ridgeway Academy Welwyn Garden City · Secondary · Ages 11–18	Academy	875	21.1 Lower 50%	35.7 Attainment 8	875
77	The Adeyfield Academy Hemel Hempstead · Secondary · Ages 11–18	Academy	858	17.5 Lower 50%	35.1 Attainment 8	858
78	Aldenham School Elstree · All-through · Ages 3–19	Independent	849	28.9 Lower 50%	41.5 Attainment 8	849
79	St Columba's College St Albans · All-through · Ages 4–19	Independent	822	23.2 Lower 50%	32.9 Attainment 8	822
80	Robert Barclay Academy Hoddesdon · Secondary · Ages 11–18	Academy	821	44.8 Lower 50%	44.2 Attainment 8	821
81	St Margaret's School Bushey · All-through · Ages 2–18	Independent	799	87.1 Top 10%	56.3 Attainment 8	799
82	Onslow St Audrey's School Hatfield · Secondary · Ages 11–18	Academy	787	23.2 Lower 50%	36.6 Attainment 8	787
83	Townsend Church of England School St Albans · Secondary · Ages 11–18	Local authority	746	48.8 Top 50%	46.7 Attainment 8	746
84	The Reach Free School Rickmansworth · Secondary · Ages 11–18	Academy	734	46.3 Lower 50%	44.2 Attainment 8	734
85	The John Warner School Hoddesdon · Secondary · Ages 11–18	Academy	726	36.6 Lower 50%	40.8 Attainment 8	726
86	Laureate Academy Hemel Hempstead · Secondary · Ages 11–18	Academy	703	35.2 Lower 50%	41.7 Attainment 8	703
87	St Edmund's College Ware · All-through · Ages 2–19	Independent	684	26.5 Lower 50%	35.5 Attainment 8	684
88	Avanti Grange Secondary School Bishops Stortford · Secondary · Ages 11–18	Academy	660	93.9 Top 5%	10% Free school meals	660
89	Fairlands Primary School Stevenage · Primary · Ages 3–11	Academy	655	37.5 Lower 50%	57% KS2 expected standard (RWM)	655
90	Peartree Spring Primary School Stevenage · Primary · Ages 4–11	Local authority	626	57.5 Top 50%	68% KS2 expected standard (RWM)	626
91	Fearnhill School Letchworth · Secondary · Ages 11–18	Local authority	597	21.1 Lower 50%	38.9 Attainment 8	597
92	Goffs - Churchgate Academy Waltham Cross · Secondary · Ages 11–16	Academy	582	35.4 Lower 50%	42.6 Attainment 8	582
93	Martins Wood Primary School Stevenage · Primary · Ages 2–11	Academy	532	52.5 Top 50%	65% KS2 expected standard (RWM)	532
94	Elstree Screen Arts Academy Borehamwood · Secondary · Ages 14–19	Academy	524	31.9 Lower 50%	39.1 Attainment 8	524
95	St Christopher School Letchworth Garden City · All-through · Ages 2–18	Independent	492	83.5 Top 25%	58.3 Attainment 8	492
96	Edwinstree Church of England Middle School Buntingford · Secondary · Ages 9–13	Local authority	486	26.0 Lower 50%	43% KS2 expected standard (RWM)	486
97	Flamstead End School Waltham Cross · Primary · Ages 2–11	Academy	474	74.0 Top 25%	72% KS2 expected standard (RWM)	474
98	The Grove Academy Watford · Primary · Ages 3–11	Academy	473	32.9 Lower 50%	64% KS2 expected standard (RWM)	473
99	Fairfields Primary School and Nursery Waltham Cross · Primary · Ages 3–11	Local authority	467	52.1 Top 50%	68% KS2 expected standard (RWM)	467
100	Downfield Primary School Waltham Cross · Primary · Ages 2–11	Local authority	467	18.7 Lower 50%	22% KS2 expected standard (RWM)	467

Sandringham School in St Albans leads the 2025 list of largest schools in Hertfordshire with Pupils 1,777. Of the 100 schools shown, 73 are academy, 14 are independent, 13 are local authority.

For the full picture see the wider East of England largest schools league table, every school on the Hertfordshire page, or the comparison tool to put a shortlist side by side.

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Frequently asked questions

What is the best largest school in Hertfordshire?

Sandringham School in St Albans, East of England ranks first among largest schools in Hertfordshire with Pupils 1,777 (Pupils on roll: 1,777).

How are largest schools in Hertfordshire ranked?

Schools with the most pupils on roll. Only schools eligible for the Success Index (England) are included; the index is shown alongside for context.

Are these 2025 rankings official?

No. They are computed by Success Tutoring from official English data (DfE – Get Information About Schools; DfE – Compare school and college performance). Independent schools rarely appear in the performance tables, so most receive no attainment components and no score.