DA4 may refer to:
DA postcode area (Dartford postcode area), a group of postal codes in England 3/15 DA-4, a BMW car model DA4, a model of Honda Integra DA4, a Eurofighter Typhoon variant DA4, an engine used in the locomotive British Rail 11104 DA4, a module code for the Dungeons & Dungeons adventure The Duchy of Ten Dragon Age: The Veilguard, a 2024 video game