Tradition holds that Edward the Confessor was baptised in a church in Islip. The Church of Englandparish church of Saint Nicholas the Confessor has certainly existed since at least 1065, but the earliest part of the present building is the arcade between the nave and north aisle, which was built in about 1200 in the Transitional style between Early English and Decorated Gothic. The chancel was rebuilt in 1780. In 1861 the Gothic Revival architect E.G. Bruton remodelled the chancel and restored the rest of the church. In 1824 some medieval wall-paintings were uncovered in the south aisle. They included an Adoration of the Magi and a weighing of souls, both of which were considered to have been painted late in the 14th century. There was also an earlier Adoration, over which the later version had been painted, and there was also a Resurrection. All the paintings were plastered over during Bruton's restoration of the St. Nicholas' in 1861. William Buckland, theologian, geologist and palaeontologist, is buried at the church. St. Nicholas' parish church is Islip's only Grade I Listed Building.
Bells and clock
The belltower had a ring of five bells cast in the 17th century. In 1859 George Mears of the Whitechapel Bell Foundry recast them into a ring of six. In 1956 Mears and Stainbank of Whitechapel increased this to eight by casting the present treble and second bells. St. Nicholas' has also a Sanctus bell cast in 1652 by James Keene of Woodstock. The date of the church clock is unknown. It may be late 17th century, and is believed to have been made by Edward Hemins of Bicester.
Rev. Dr. South, who founded Islip's parish school in 1710, had the then Rectory built for him in 1689. The Rectory is a Cotswold stone double pile house of five bays with attic dormer windows, 18th century sash windows and a central doorcase with canopy on carved brackets. William Vincent had the house enlarged in 1807, and it was restored in the middle of the 19th century. The Old Rectory is Islip's only Grade II* Listed Building.
was born in Islip in about 1004. A chapel associated with him used to exist north of the church. Monks from Westminster Abbey studying at Gloucester College, Oxford used to celebrate the feast of St. Edward at the chapel. In April 1645 during the English Civil War the chapel was damaged in a military engagement, and in the 1780s it was demolished. In 2006 the Channel 4 archaeology programme Time Team visited Islip and tried unsuccessfully to find the remains of the chapel.