London Southend Airport (IATA: SEN, ICAO: EGMC) is a minor international airport situated on the outskirts of Southend-on-Sea in Essex, England, approximately 36 miles (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 London's third-busiest airport from the 1960s until the end of the 1970s, when it was overtaken in passenger numbers by London Stansted Airport. 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 Liverpool Street Station and Southend Victoria.