Maldon is a town and civil parish on the Blackwater estuary in Essex, England. It is the seat of the Maldon District and starting point of the …Maldon is a town and civil parish on the Blackwater estuary in Essex, England. It is the seat of the Maldon District and starting point of the Chelmer and Blackwater Navigation. It is known for Maldon Sea Salt which is produced in the area. In 2011 the parish had a population of 14,220 and the district had a population of 61,700.