Which Country Starts the Secondary School Education the Latests?

Based on a comparison of 177 countries in 2016, Namibia ranked the highest in secondary school starting age with 14.0 years followed by South Africa and Tanzania. On the other end of the scale was Germany with 10.0 years, Slovakia with 10.0 years and Sri Lanka with 10.0 years.

Data for more countries are available at Secondary School Starting Age indicator page.