Adyar

Adyar or Adayar may refer to:


 * Adyar, Bhandara, a small town in Maharashtra, India
 * Adyar, Chennai, a locality in Chennai (Madras) in the state of Tamil Nadu, India
 * Battle of Adyar, October 1746
 * Adyar Eco Park (also known as Tholkappia Poonga), an ecological park set up in the Adyar estuary area
 * Adyar River, a river in Chennai city
 * Adyar Gate, another name of ITC Sheraton Park hotel & Towers in Chennai
 * Theosophical Society Adyar, an international occult organisation headquartered in Adyar, Chennai
 * Adyar, Karnataka, a town in Karnataka, India
 * Adayar (horse), an Irish-bred Thoroughbred racehorse