Hoërskool Overkruin is a public Afrikaans and English language-medium high school in Wonderboom, Pretoria, Gauteng, South Africa.

Originally named Hoërskool Sinoville, the school was founded on 10 June 1974.

It was later renamed to Hoërskool Overkruin and had grown from 408 pupils in 1974 to 1270 by the year 2014.

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