Southend-on-Sea is a locality located 58.3 km west from London in East of England, England, United Kingdom. The population of Southend-on-Sea is 160,257 people. Canterbury, Chelmsford, Ipswich are located close to Southend-on-Sea. You can find Southend-on-Sea on any map using the following decimal coordinates: 51.5379 (latitude), 0.7138 (longitude).