Ray Mill Island is an island in the River Thames in England at Boulter's Lock near Maidenhead, Berkshire.
It is immediately to the east of Boulter's Island, separated by the former millstream.
The island is now a park administered by the Royal Borough of Windsor and Maidenhead. It is named after the Ray family who once had a flour mill here. The mill was constructed in 1726 on the site of a previous mill, and continued to produce flour until the 1920s.
Boulter's weir runs from the top end of the island across to the east bank near Taplow. A kayak flume has been built adjacent to the weir on the island.
For over 20 years until it was stolen in October 2011, the island housed The Companion, a memorial statue for four local schoolboys who died in a skiing accident.[1] A new version of the statue was unveiled in the original location in July 2012.[2]