London Southend Airport (IATA: SEN, ICAO: EGMC) is an international airport situated on the outskirts of Southend-on-Sea in Essex, England, approximately 36 mi (58 km) from the centre of London. The airport straddles the boundaries between the city of Southend-on-Sea and the Rochford District.

Southend was the UK's third-busiest airport during the 1960s, behind Heathrow and Manchester, before passenger numbers dropped off in the 1970s. Following its purchase by Stobart Group in 2008, a development programme provided a new terminal and control tower, extended the runway, and opened Southend Airport railway station on the Shenfield-Southend line, which provides a connection to Central London via a regular rail service between London Liverpool Street and Southend Victoria.