The parish is set in folds of the Chiltern Hills to the south of Bledlow Ridge next to the border with Oxfordshire.

Settlement in the area dates back to Roman times as demonstrated by the excavation of a Romano-British glass ribbed bowl from the village, now in the British Museum.

[3] Radnage is not mentioned in Domesday Book and it appears from a 13th-century document to have been royal demesne attached to the manor of Brill.

The larger part, known as Radnage Manor, was for a time retained by the crown and then in 1215 was granted by King John to the Knights Templar.

King Charles I mortgaged it with other crown lands to the City of London in order to raise money.

The village holds an annual 5k and 10k trail run race to raise money for the local school.

The south porch and outer door are original of the 13th century, but with a 15th-century roof and 15th-century windows in the side walls.

The fine 15th-century nave roof has embattled tie-beams supported by arched brackets with tracery in the spandrels and also in the triangular spaces above the beams.