thumb|right|The Green
Upper Basildon is a small village in the civil parish of Basildon (where the United Kingdom 2011 Census population is included), near to Pangbourne, in the English county of Berkshire. It has a church, dedicated to St. Stephen, built in 1964 in the shape of the Christian secret symbol of a fish.
In old times, Basildon Revel was held from the 20th–25th July on Upper Basildon Green.