A7 or A-7 can refer to:

• The A7 road in the United Kingdom from Edinburgh to Carlisle.
• The A7, a motorway in Switzerland from Winterthur to Kreuzlingen.
• The A7 , a motorway in the Netherlands from Nieuweschans to Amsterdam. Part of this road is also the European route E22 (running over the afsluitdijk).
• A7, a German rocket design in World War II, never implemented.
• A7, an international standard paper size (74×105 mm) defined in ISO 216.
• HMS A7, an A-class submarine of the Royal Navy.
• USS A-7, a Plunger-class submarine of the United States Navy.
• The Ling-Temco-Vought A-7 Corsair II, a light attack aircraft.