| Official Name: | Dadda'to دادتو |
| Pushpin Map: | Djibouti |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location in Djibouti |
| Coordinates: | 12.3752°N 84.67°W |
| Subdivision Type: | Country |
| Subdivision Name: | Djibouti |
| Subdivision Type1: | Region |
| Subdivision Name1: | Obock Region |
| Elevation M: | 460 |
Dadda'to (Arabic: دادتو) is a village in Djibouti, located in the region of Obock.
The town lies near the border with Eritrea. Nearby towns and villages include Alaili Dadda (30 km) and Assa Gaila (38 km).
The village wall comprises a surface no larger than 80 m × 60 m, with a dozen houses and a mosque.
It is the largest settlement on the Djiboutian border with Eritrea. When France and Italy first set the boundary between Italian Eritrea and French Somaliland, Dadda'to was used as a term of reference for the latitude at which the horizontal boundary was placed. The Djibouti–Eritrea boundary has since been changed, but Dadda'to remains on the frontier.
The climate is arid desert climate in Dadda'to. Agriculture is very rare, at the time of fruits and vegetables grown in the hot, desert plants or Aloe Vera.