Letňany is a cadastral area of Prague, Czech Republic. It was founded in 1307 and became part of Prague in 1968. It has been included in Prague 18 since 2001, having previously been in the local government district of Prague-Letňany, and it has its own cadastral area (also called "Prague 18").
There is a large shopping mall, Obchodní centrum Letňany, with an area in excess of 125,000 m<sup>2</sup>.
Letňany was the centre of Czech aircraft production, with major aviation companies such as Avia and Letov, but as the industry gradually declined, Letňany became a mostly residential district. There are two airports: the non-public international Letňany Airport and Kbely military airport.
Nearby Letňany metro station opened in May 2008, on the new extension of Prague's Line C.
Government
The Air Accidents Investigation Institute has its head office in Letňany.