London Southend Airport (IATA: SEN, ICAO: EGMC) is an 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 added a connection to central London via a regular rail service running between Liverpool Street Station and Southend Airport Station on the Shenfield–Southend line, continuing on to Southend Victoria.

As of 2022, all passenger services are provided by EasyJet.