DDDD may refer to:
Arts and entertainment Dead Dead Demon's Dededede Destruction, a 2014–2022 manga series, adapted to anime in 2024 D.D.D.D. (Destroy Devastating and Disgusting Derivatives), a 1995 album by Incapacitants "D.D.D.D.", the ending theme of episodes 5 and 6 of the anime series Dorohedoro
Other uses DDDD, the Helmholtz notation for subsubcontra D (musical note) DDDD, a U.S. bra size DDDD, a non-standard SPARS code indicating digital recording equipment and musical instruments dddd, a code used in date formats to indicate "day of the week spelled out in full"
See also 4D (disambiguation) D4 (disambiguation) DDD (disambiguation) Four Ds, the guiding principles of the Allied occupation of Germany The "4 Ds" of pruning