| Adacao | |
| Settlement Type: | Village |
| Pushpin Map: | Guam |
| Pushpin Label Position: | right |
| Pushpin Mapsize: | 300 |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | Territory |
| Subdivision Name1: |  Guam |
| Unit Pref: | Imperial |
| Coordinates: | 13.4894°N 144.8531°W |
Adacao is a settlement in the north-east of Guam.[1] It is located on the east coast, 11 miles east of Hagåtña, in the village of Mangilao.