Gorokan High School will be closed from Wednesday, 25 August due to a member of the school community returning a positive COVID-19 test.
The individual was infectious whilst on the school site last week.
Approximately 20 students and staff were on-site at the same time and have been asked to self-isolate until they receive further advice from NSW Health.
NSW Health has immediately commenced contact tracing and the NSW Department of Education will only re-open the school when it is safe to do so.
NSW Health has requested that anyone who is unwell or has developed symptoms gets tested immediately.