The minor district (king amphoe) Song Dao was created on 1 April 1972, when the three tambons Song Dao, Watthana, and Tha Sila were split off from Sawang Daen Din district.
The minor district (king amphoe) Song Dao was established on 1 April 1972, when the three tambons Song Dao, Watthana, and Tha Sila were separated from Sawang Daen Din district.