What is the average primary school class size in Hounslow?

The average primary school class size in Hounslow is 26.1 pupils per class in the 2025/26 academic year. The England average is 26.2 — so Hounslow primary classes are smaller than average (a resource advantage). This covers 20,440 pupils in 784 classes across state-funded primary schools. Source: DfE 2025/26, OGL v3.0.

What is the average secondary school class size in Hounslow?

Secondary school classes in Hounslow average 21.9 pupils per class (England average: 22.6) in 2025/26. Classes are smaller than the England average. This covers 19,852 pupils in 908 classes. Source: DfE 2025/26, OGL v3.0.

What is the Gera School Resource Index for Hounslow?

The Gera School Resource Index for Hounslow is 101.9 — ranked #48 of 151 local authorities published. The index is centred at 100 (England mean). A score above 100 means smaller classes (more resource per pupil); below 100 means larger classes than the England average. The GSRI is computed from the real DfE 2025/26 class-size figures — see the methodology page for the exact formula.

Why do class sizes vary so much between local authorities?

Class sizes depend on local demographic trends (birth rate fluctuations), number of available schools and teachers, local authority budget decisions, and whether schools operate under- or over-capacity. Rural areas like Westmorland and Furness (GSRI 114.0) often have smaller schools with naturally smaller classes. Urban authorities with rapid population growth tend towards larger classes. Class sizes in England are regulated by the infant class size legislation (30-pupil limit for Key Stage 1) but secondary classes have no statutory cap. Real DfE data, OGL v3.0.

How is the Gera School Resource Index calculated?

The Gera School Resource Index uses two real DfE figures: average primary class size and average secondary class size, both for 2025/26. For each LA: pScore = round((England_primary_avg ÷ LA_primary) × 100, 1); sScore = round((England_secondary_avg ÷ LA_secondary) × 100, 1); GSRI = round((pScore + sScore) ÷ 2, 1). England averages are 26.2 (primary) and 22.6 (secondary), both pupil-weighted across all published LAs. Full methodology at https://geralearn.com/school-resource-index/methodology.

GeraLearn / School Resource Index / Hounslow

Hounslow School Class Sizes 2025/26

State-funded primary schools in Hounslow average 26.1 pupils per class — smaller than the England average of 26.2. Secondary: 21.9 pupils/class. Real DfE 2025/26 data (OGL v3.0).

How large are school classes in Hounslow, and how does this compare to the England average?

In the 2025/26 academic year, state-funded primary schools in Hounslow have an average class size of 26.1 pupils — 0.1 pupils below the England average of 26.2. Secondary schools average 21.9 (England: 22.6). Gera School Resource Index for Hounslow: 101.9 / 100 (England mean 100). Source: DfE 2025/26 (OGL v3.0).

Source:DfE — Schools, pupils and their characteristics, Academic year 2025/26·As of Academic year 2025/26 · updated annual · last refreshed 20 June 2026

Gera School Resource Index

Hounslow ranks #48 of 151 local authorities (England mean = 100). A score above 100 means smaller-than-average classes (more teacher time per pupil); below 100 means larger-than-average classes. Computed from real DfE 2025/26 class-size figures — see methodology.

How this is calculated

101.9

Hounslow vs England — class sizes 2025/26

Measure	Hounslow	England	Difference
Average primary class size	26.1	26.2	0.1 below ✓
Average secondary class size	21.9	22.6	0.8 below ✓
Primary pupils (total)	20,440	—	—
Secondary pupils (total)	19,852	—	—
Gera School Resource Index	101.9	100 (mean)	Rank #48/151

Data: DfE state-funded schools, 2025/26 academic year. Primary: 784 classes. Secondary: 908 classes. Licensed OGL v3.0.

Check school class sizes for your area

Pick a local authority. We show the real DfE 2025/26 average primary and secondary class sizes, how they compare to England, and the Gera School Resource Index — computed from published data.

Local authority

Primary schools

Avg class size: 26.1 (England 26.2)

0.1 below England average.

20,440 pupils · 784 classes

Secondary schools

Avg class size: 21.9 (England 22.6)

0.8 below England average.

19,852 pupils · 908 classes

Gera School Resource Index

101.9

England mean 100 · ranked #48 of 151 LAs

Smaller than average classes → more resource per pupil

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Hounslow school class sizes — FAQ

What is the average primary school class size in Hounslow?: The average primary school class size in Hounslow is 26.1 pupils per class in the 2025/26 academic year. The England average is 26.2 — so Hounslow primary classes are smaller than average (a resource advantage). This covers 20,440 pupils in 784 classes across state-funded primary schools. Source: DfE 2025/26, OGL v3.0.
What is the average secondary school class size in Hounslow?: Secondary school classes in Hounslow average 21.9 pupils per class (England average: 22.6) in 2025/26. Classes are smaller than the England average. This covers 19,852 pupils in 908 classes. Source: DfE 2025/26, OGL v3.0.
What is the Gera School Resource Index for Hounslow?: The Gera School Resource Index for Hounslow is 101.9 — ranked #48 of 151 local authorities published. The index is centred at 100 (England mean). A score above 100 means smaller classes (more resource per pupil); below 100 means larger classes than the England average. The GSRI is computed from the real DfE 2025/26 class-size figures — see the methodology page for the exact formula.
Why do class sizes vary so much between local authorities?: Class sizes depend on local demographic trends (birth rate fluctuations), number of available schools and teachers, local authority budget decisions, and whether schools operate under- or over-capacity. Rural areas like Westmorland and Furness (GSRI 114.0) often have smaller schools with naturally smaller classes. Urban authorities with rapid population growth tend towards larger classes. Class sizes in England are regulated by the infant class size legislation (30-pupil limit for Key Stage 1) but secondary classes have no statutory cap. Real DfE data, OGL v3.0.
How is the Gera School Resource Index calculated?: The Gera School Resource Index uses two real DfE figures: average primary class size and average secondary class size, both for 2025/26. For each LA: pScore = round((England_primary_avg ÷ LA_primary) × 100, 1); sScore = round((England_secondary_avg ÷ LA_secondary) × 100, 1); GSRI = round((pScore + sScore) ÷ 2, 1). England averages are 26.2 (primary) and 22.6 (secondary), both pupil-weighted across all published LAs. Full methodology at https://geralearn.com/school-resource-index/methodology.

How the Gera School Resource Index is calculated for Hounslow

The GSRI compares each local authority's average class sizes to the England pupil-weighted average, then averages the two ratios.

pScore = round((26.16 ÷ 26.07) × 100, 1) = 100.3

sScore = round((22.64 ÷ 21.86) × 100, 1) = 103.6

GSRI = round((100.3 + 103.6) ÷ 2, 1) = 101.9

A GSRI of 101.9 means Hounslow has smaller-than-average classes — more direct teacher time per pupil than the England mean. Full methodology →

School class sizes in other London local authorities

See all 151 local authorities ranked by the Gera School Resource Index →

Source: DfE — Schools, pupils and their characteristics, Academic year 2025/26. Figures are for state-funded schools, 2025/26 academic year. Licensed under the Open Government Licence v3.0 (OGL v3.0). The Gera School Resource Index for Hounslow is computed by GeraLearn from these figures; no number is modelled, interpolated or estimated.