Koyna may refer to:
Koyna River, a river which originates in the Western Ghats of Maharashtra Koyna Wildlife Sanctuary, a wildlife refuge in the Western Ghats of Maharashtra Koynanagar, a town at the site of the Koyna Dam Koyna Dam, a dam on Koyna River Koyna Hydroelectric Project, hydroelectric project associated with the Koyna River and dam Koyna (harvestman), an arachnid genus in the Assamiidae family of harvestman