Temple Island is an eyot (being a small riverine island) in the River Thames in England just north (downstream) of Henley-on-Thames, Oxfordshire. The island is on the reach above Hambleden Lock between the Buckinghamshire and Berkshire banks, and is part of Remenham in Berkshire. The main significance of the island is that it lies at the start of the course for Henley Royal Regatta.