[2] After the Norman Conquest Marsworth (Missevorde) is recorded in the Domesday Book of 1086 as being in the possession of Robert D'Oyly and was connected to Wallingford, an association which continued into the 17th century.

By 1319 records show there were still several overlords controlling various parts of Marsworth including a descendant of Isabel Bassett, John de Beauchamp Lord of the Manor at Hawridge.

This is the first indication of a tie-up between Marsworth and the detached manor or Hawridge, possibly to provide woodland and hilltop summer pasture for the estate across the narrow isthmus of Hertfordshire.

The construction of the Grand Union Canal, which passes through Marsworth brought with it many new business opportunities and the village expanded greatly as a result.

Within the parish boundary of Marsworth, to the south of the main village where the canal cross the Lower Icknield Way is the hamlet of Startop's End.