Daitō (大東市, Daitō-shi) is a city located in Osaka Prefecture, Japan.

During the Sengoku period, the Miyoshi clan dominated Kawachi Province from their stronghold at Iimoriyama Castle.

During the Edo Period, the Tokugawa shogunate diverted the course of the Yamato River as part of a massive flood control project, which also resulted in the creation of a large amount of new farmland.

The villages of Suminodo, Nango and Shijo were established with the creation of the modern municipalities system on April 1, 1889.

Daitō has a mayor-council form of government with a directly elected mayor and a unicameral city council of 17 members.

In terms of national politics, the city is part of Osaka 12th district of the lower house of the Diet of Japan.