Heybridge Basin is a village and civil parish about 1 mile from Maldon, in the Maldon district, in the county of Essex, England. In 2018 the built up area had an estimated population of 732. The parish was formerly part of Heybridge parish, on 1 April 2020 it became a separate parish. Heybridge Basin is where the Chelmer and Blackwater Navigation Canal merges into the tidal Blackwater Estuary, fed by the rivers Blackwater and Chelmer.