Diah may refer to:
People With the given name Diah Hadaning (1940–2021), Indonesian writer Diah Permata Megawati Setiawati Sukarnoputri (born 1947), Indonesian politician, fifth president of Indonesia from 2001 to 2004 Diah Permatasari (actress) (born 1971), Indonesian actress Diah Permatasari (fencer) (born 1990), Indonesian fencer
With the surname Abel Peter Diah (born 1971), Nigerian politician Herawati Diah (1917–2016), Indonesian journalist
See also Dia (disambiguation)