A24 is a film distribution, production and finance company.

A24, A-24 or A.24 may also refer to:

• A24 motorway (Austria), a road connecting Vienna and the A23 to Stockerau
• A 24 motorway (Germany), a road connecting Hamburg and Berlin
• A24 motorway (Italy), a road connecting Rome and the Adriatic Sea
• A24 motorway (Portugal), a road connecting Viseu and Chaves
• A-24 motorway (Spain), a proposed road to connect Daroca and Burgos
• A 24 road (Sri Lanka), a road connecting Matara and Akuressa
• A24 road (United Kingdom) may refer to:
  • A24 road (England), a road connecting London and Worthing
  • A24 road (Isle of Man), a road connecting the A3 and the A5
  • A24 road (Northern Ireland), a road connecting Belfast and Clough

• A-24 Banshee, World War II U.S. Army dive bomber
• Aero A.24, a Czech bomber design of the 1920s

• A24 news channel, a pan-African 24-hour station starting broadcasting from Nairobi in 2008
• América 24, recently known as A24, an Argentine news cable TV channel
• Samsung Galaxy A24, an Android-based smartphone by Samsung Electronics

• British NVC community A24 (Juncus bulbosus community), a plant community
• English Opening, a chess opening where White plays 1.c4
• HLA-A24, an HLA-A serotype
• A24 trap used to kill pest or invasive rodents and marsupials

• 24A (disambiguation)