Aida District, Okayama

Aida (英田郡, Aida-gun^?) is a district located in Okayama Prefecture, Japan.

As of 2003, the district has an estimated population of 31,845 and a density of 79.65 persons per km². The total area is 399.83 km².

Aida District consists of the following village:

Prior to March 31, 2005, Aida District included

On that date, all but Nishiawakura merged to form the new city of Mimasaka.