Great Parndon is an area and former civil parish in Essex, England, that has been absorbed by the new town of Harlow and is now an electoral ward.It had a recorded population of 18 people in 1086, rising to 41 by 1524–25. In 1622, there were 71 houses between the two parishes of Great and Little Parndon, with most names attributed to Great Parndon, given that Little Parndon was small and sparsely populated.