A13

A13 or A-13 is a three-letter acronym that may refer to:

;Transport
* A13 autoroute, a motorway in France
* A13 motorway (Luxembourg), a motorway in Luxembourg connecting Schengen to Bettembourg
* A13 motorway (Netherlands)
* A13 motorway (Portugal), a motorway connecting Santarem to the southward turn of the A2
* A13 motorway (Switzerland), a motorway connecting St. Margrethen to Bellinzona
* Quebec Autoroute 13
* A13 highway (Lithuania)
* - Australian National Highway Route:
**Salisbury Highway, a major arterial road in Adelaide, South Australia.
**South Road, a major arterial road in Adelaide, South Australia.

* - South Australian State Route:
**Salisbury Highway, a major arterial road in Adelaide, South Australia.
**South Road, a major arterial road in Adelaide, South Australia.
** Victor Harbor Road, on the Fleurieu Peninsula, South Australia.
* a national road in Latvia

;Military
* Antonov A-13, a 1958 Soviet acrobatic sailplane
* HMS A13, a British A class submarine of the Royal Navy
* "A-13", a series of British light tanks designed and built before and during the Second World War. There are several different types of tanks designated by their mark.
** Cruiser Mk III
** Cruiser Mk IV
** Covenanter tank

;Chess
* A13, one of the Encyclopaedia of Chess Openings codes for the English Opening in chess