Average class size (primary school) by country
United States: 20.1 in 2024, 17th of 32 OECD members (highest first). 18th of all 37 with data.
Highest: 
Chile (30.0, 2024) · Lowest: 
Peru (13.6, 2024) · 37 countries and territories with data.
Average number of pupils per class in primary school (public and private combined). Covers OECD members and some other countries.
Ranking
Latest value for each country (within 5 years).
Over time
United States: rank over time
Rank among the countries with data in each year (highest first).
World ranking (highest first)
| Rank | Country | Value | Year |
|---|---|---|---|
| 1 | Chile | 30.0 | 2024 |
| 2 |  Israel | 27.2 | 2024 |
| 3 |  Japan | 26.4 | 2024 |
| 4 |  United Kingdom | 25.9 | 2024 |
| 5 |  Türkiye | 23.1 | 2024 |
| 6 |  Australia | 22.9 | 2024 |
| 7 |  Mexico | 22.8 | 2024 |
| 8 |  Netherlands | 22.5 | 2024 |
| 9 |  Hungary | 22.2 | 2024 |
| 10 |  Colombia | 21.9 | 2024 |
| 11 |  France | 21.4 | 2024 |
| 12 |  Germany | 21.1 | 2024 |
| 13 |  South Korea | 20.9 | 2024 |
| 14 |  Spain | 20.9 | 2024 |
| 15 |  Sweden | 20.4 | 2024 |
| 16 |  Bulgaria | 20.3 | 2024 |
| 17 |  Portugal | 20.2 | 2024 |
| 18 |  United States | 20.1 | 2024 |
| 19 |  Brazil | 19.8 | 2024 |
| 20 |  Czechia | 19.7 | 2024 |
| 21 |  Romania | 19.5 | 2024 |
| 22 |  Denmark | 19.0 | 2024 |
| 23 |  Finland | 18.7 | 2024 |
| 24 |  Lithuania | 18.7 | 2024 |
| 25 |  Slovakia | 18.6 | 2024 |
| 26 |  Iceland | 18.5 | 2024 |
| 27 |  Austria | 18.5 | 2024 |
| 28 |  Estonia | 18.3 | 2024 |
| 29 |  Slovenia | 18.2 | 2024 |
| 30 |  Poland | 18.0 | 2024 |
| 31 |  Italy | 17.9 | 2024 |
| 32 |  Latvia | 17.5 | 2024 |
| 33 |  Greece | 16.8 | 2024 |
| 34 |  Luxembourg | 15.7 | 2024 |
| 35 |  Croatia | 15.5 | 2024 |
| 36 |  Costa Rica | 14.6 | 2024 |
| 37 | Peru | 13.6 | 2024 |
Source: OECD Data Explorer, Average class size (OECD). License: CC BY 4.0. Data retrieved: 2026-10-28.
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