Rannu is a small borough in Elva Parish, Tartu County, Estonia.
Rannu may also refer to the following places:
Estonia Rannu, Lääne-Viru County, village in Viru-Nigula Parish, Lääne-Viru County Rannu, Pärnu County, village in Lääneranna Parish, Pärnu County Rannu Parish, former municipality in Tartu County
India Rannu, Uttar Pradesh, a village