Adajania is an Indian (Parsi) toponymic surname for Adajan, a suburb of Surat in India. Notable people with the surname include:
Aspy Adajania (1942–1994), Indian Army officer and sports administrator, father of Homi Adajania Homi Adajania (born 1972), Indian film director and writer Nancy Adajania (born 1971), Indian cultural theorist and art critic Anaita Shroff Adajania (born 1972), Indian fashion designer