Rivermead Island is an island in the River Thames on the reach above Molesey Lock at Sunbury-on-Thames, Surrey, England. It is unpopulated, being a large area of open space. It is connected to the bank by a footbridge, and vehicle access is possible via a ford of the narrow stream separating it from the land. The Sunbury Amateur Regatta takes place here usually in August each year.
Rivermead was originally two islands, the other part being Swan's Rest. However they are now completely joined.
| Next island upstream | River Thames | Next island downstream |
| Sunbury Lock Ait | Rivermead Island | Sunbury Court Island |