Bundesautobahn 39 (translates from German as Federal Motorway 39, short form Autobahn 39, abbreviated as BAB 39 or A 39) is an autobahn in northern Germany.

It currently connects the cities of Salzgitter, Braunschweig and Wolfsburg, with a planned extension to Lüneburg.

The A 39 begins north of Wolfsburg and ends at the A 7 close to Salzgitter.

It crosses the A 2 south of Wolfsburg close to Königslutter.

This German road or road transport-related article is a stub.