From DataNSW
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Average government primary school class sizes by year (1997, 2002-2024)

Created 24/06/2025

Updated 13/11/2025

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Data Notes

Class size audits are conducted by CESE (Centre for Education Statistics and Evaluation) in March each year. Audits were not conducted in 1998, 1999, 2000 and 2001.

Data for 2020 should be treated with caution. The collection took place in March when schools were impacted by COVID-19, so fewer data checks were carried out.

Students attending schools for specific purposes (SSPs), students in support classes in regular schools and distance education students are excluded from average class size calculations.

The average class size for each grade is calculated by taking the number of students in all classes that a student from that grade is in (including composite/multi age classes) divided by the total number of classes that includes a student from that grade. This can result in a lower Kindergarten to Year 6 average class size than any individual year level.

From 2017, school size is based on primary enrolment rather than school classification.

Schools change size, so data in Table 2 is not necessarily comparable to previous iterations in earlier fact sheets.

Data Source Education Statistics and Measurement, Centre for Education Statistics and Evaluation. Data quality statement The Class Size Audit Data Quality Statement addresses the quality of the Class Size Audit dataset using the dimensions outlined in the NSW Department of Education's data quality management framework: institutional environment, relevance, timeliness, accuracy, coherence, interpretability and accessibility. It provides an overview of the dataset's quality and highlights any known data quality issues.

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Additional Info

Field Value
Title Average government primary school class sizes by year (1997, 2002-2024)
Language eng
Licence Creative Commons Attribution 3.0 Australia
Landing Page https://data.gov.au/data/en/dataset/43438137-084e-4d50-81c0-ce741ea3b37b
Remote Last Updated 14/10/2025
Contact Point
NSW Department of Education
open.data@det.nsw.edu.au
Reference Period 01/01/1997 - 31/12/2024
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    147.0179,
    -32.1618
  ],
  "type": "Point"
}
Data Portal DataNSW

Data Source

This dataset was originally found on DataNSW "Average government primary school class sizes by year (1997, 2002-2024)". Please visit the source to access the original metadata of the dataset:
https://data.nsw.gov.au/data/dataset/nsw-nsw-education-average-government-primary-school-class-sizes-by-year