A ComRes survey of over 4,000 adults also showed two thirds had fond memories of celebrating it in the past.
Bringing in food, singing hymns and saying prayers were some of things people remembered about Harvest at schools while teaching on generosity and the environment were the main benefits according to those questioned.
Only half of respondents said their children currently participate in the festivals at school though.
It's thought some schools don't mark the occasion at all.
The Church of England's chief education officer, Rev Nigel Genders, said: "Harvest Festival is just one of the ways that the Christian tradition enriches the lives of children of all backgrounds as part of daily collective worship.
"It's encouraging to know that parents agree and there is a clear call for more schools of all kinds to use the coming weeks to celebrate harvest, and I hope many will do so.
"Harvest is a wonderful opportunity for all schools and nurseries to help children and young people to think about how food reaches their plates and to say thank you for all they have received, as well as giving to those in need."
Churches across the country will hold harvest collections in the coming weeks which will support local foodbanks.
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