Felmersham with Radwell was recorded in the Domesday Book of 1086 as a parish within the Hundred of Willey.

[2] John de Burnham, later Lord High Treasurer of Ireland, was parish priest here in the 1330s.

The village gave its name to HMS Felmersham, a Ham class minesweeper.

Felmersham Gravel Pits nature reserve is North of the village, just over the River Great Ouse.

It is understood that the pits were created by extracting sand and gravel to build local airfields in World War Two.