Overview
The Olimpiade Sains Nasional (OSN, Indonesia National Science Olympiad) is an annual science competition for primary, junior secondary and senior secondary students, run by the Pusat Prestasi Nasional under the ministry of primary and secondary education. For senior secondary (SMA/MA/SMK/MAK and equivalent) students it picks the best from 38 provinces and Indonesian schools abroad.
Who can enter
Senior secondary students at SMA, MA, SMK, MAK or equivalent schools. Participants advance from their school and district to their province.
Levels or stages
Selection runs in four steps:
School level (OSN-S)
District or city level (OSN-K)
Provincial level (OSN-P)
National level (OSN)
For 2026, OSN-K had a trial on 7 and 8 May 2026, and a trial of OSN-P for senior secondary was held in July 2026 on an online computer-based test system with video supervision.
Subjects
The senior secondary fields reported include Mathematics, Physics, Biology, Chemistry, Astronomy, Informatics, Economics, Earth Science and Geography.
Preparation tips
Read the current year's guidebook (panduan) on the Pusat Prestasi Nasional site, which sets the syllabus and stage rules, and practise past problems for your field.
Note
The official site could not be opened with a verified connection, so details come from search listings of its pages. Confirm on the Pusat Prestasi Nasional site.
Which stages come before the national round?
School, district or city, and province stages come before the national round.