Sada (佐田町 Sada-chō) was a town located in Hikawa District, Shimane, Japan.
On March 22, 2005 Sada, along with the towns of Koryō, Taisha and Taki, all from Hikawa District, and the city of Hirata, was merged into the expanded city of Izumo.
As of 2003, the town had an estimated population of 4,415 and a density of 40.20 persons per km². The total area was 109.83 km².