A73 or A-73 may refer to:

Roads A73 motorway (Netherlands) A73 road, in the UK Quebec Autoroute 73 in Quebec Autovía A-73, a Spanish motorway Bundesautobahn 73, a German motorway also called A 73

Animals A73, an orca more commonly known as Springer (orca)

Other uses Benoni Defense, in the Encyclopaedia of Chess Openings ARM Cortex-A73, a microprocessor Samsung Galaxy A73 5G, an Android smartphone

See also List of highways numbered 73