Idah is a name. It may refer to:
Given name Idah Nabayiga (born 1979), Ugandan politician Idah Nantaba, Ugandan politician Idah Peterside (born 1974), Nigerian international football goalkeeper and media officer Idah Waringa, Kenyan journalist
Surname Adam Idah (born 2001), Irish professional footballer Ovia Idah (1903–1968), Nigerian sculptor, painter, carpenter, designer, and educator Rowetta Idah (born 1966), also known as simply Rowetta, British musician