| Tandag National Science High School | |
| Location: | Tabon-Tabon, Quezon, Tandag City, Surigao del Sur, Philippines |
| Coordinates: | 9.0596°N 126.1719°W |
| Type: | Secondary Public Science High School |
| Grades: | 7 to 12 |
The Tandag National Science High School (Filipino; Pilipino: Mataas na Paaralang Nasyonal na Pang-Agham ng Tandag) (TNSHS) is a secondary public science high school system located in Tandag City, Surigao del Sur, Philippines. It is a DepEd-legislated science high school.
TNSHS is situated at Tabon-Tabon, Quezon, Tandag City, Surigao del Sur and is accessible through pedicabs, multicabs, private vehicles and motorcycles.