Neighbor districts are : Donau-Ries , Augsburg ( district ) , GÃ 1\/4 nzburg ( district ) and in Baden-W Ã 1\/4 rttemberg : Heidenheim ( district ) ; Dillingen is the capital of Dillingen ( district ) . It is bounded by ( from the north and clockwise ) the districts of Donau-Ries , Augsburg and GÃ 1\/4 nzburg , and by the state of Baden-W Ã 1\/4 rttemberg ( district of Heidenheim ) .