Santō (山東町 Santō-chō) was a town located in Sakata District, Shiga, Japan. There was Kashiwabara-juku in Edo period.
On February 14, 2005 Santō was merged with the towns of Maihara and Ibuki, all from Sakata District, to form the new city of Maibara.
In 2003, the town had an estimated population of 13,393 and a density of 252.17 persons per km². The total area was 53.11 km².