Gerdab or Gerd Ab may refer to:Gerdab-e Olya, Chaharmahal and Bakhtiari Gerdab-e Sofla, Chaharmahal and Bakhtiari Province Gerdab-e Piazi, Fars Province Gerdab, Hormozgan Gerdab, Isfahan Gerdab, Kerman Gerdab, Khuzestan Gardab-e Yek, Khuzestan Province Gerdab-e Kebir, Kohgiluyeh and Boyer-Ahmad Province Gerdab-e Olya, Kohgiluyeh and Boyer-Ahmad Gerdab-e Saqaveh, Kohgiluyeh and Boyer-Ahmad Province Gerdab, Lorestan Gerd Ab, Mazandaran