Emblem of the city of Southend-on-Sea, England Aufkleber

Southend-on-Sea (/ˌsaʊθɛndɒnˈsiː/), commonly referred to as Southend (/saʊˈθɛnd/), is a coastal city and unitary authority area with borough status in south-eastern Essex, England. It lies on the north side of the Thames Estuary, 40 miles (64 km) east of central London. It is bordered to the north by Rochford and to the west by Castle Point. The city is one of the most densely populated places in the country outside of London. It is home to the longest pleasure pier in the world, Southend Pier, while London Southend Airport is located to the north of the city centre. Southend-on-Sea originally consisted of a few fishermen's huts and farm at the southern end of the village of Prittlewell. In the 1790s, the first buildings around what was to become the High Street of Southend were completed. In the 19th century Southend's status as a seaside resort grew after a visit from the Princess of Wales, Caroline of Brunswick, and the construction of both the pier and railway, allowing easier access from London. From the 1960s onwards, the city declined as a holiday destination. After the 1960s, much of the city centre was developed for commerce and retail, and many original structures were lost to redevelopment. As part of its reinvention, Southend became the home of the Access credit card, due to it having one of the UK's first electronic telephone exchanges. An annual seafront airshow, which started in 1986 and featured a flypast by Concorde, used to take place each May until 2012. Southend was granted city status by letters patent dated 26 January 2022 in memorial to the Conservative Member of Parliament for Southend West, Sir David Amess, a long-time supporter of city status for the borough, who was murdered on 15 October 2021. On 1 March 2022, the letters patent were presented to Southend Borough Council by Charles, Prince of Wales.