Henley-on-Thames's a town on the north side of the River Thames in south Oxfordshire, England, about 10 miles downstream and north-east from Reading, 10 miles upstream and west from Maidenhead. It's located near the corner between the counties of Oxfordshire, Berkshire and Buckinghamshire. History Henley doesn't appear in Domesday Book of 1086 often it's mistaken for Henlei in the book which's in Surrey. The first record of medieval settlement dates to 1179, when it's recorded that King Henry I… (More on Henley-on-thames)