Family name ธรัฐ (Tharat 
, Tarrat 
, ธรัฐ ) , in all the world, is a rare surname. The surname ธรัฐ is characteristic of Thailand, where it is a rare surname, Spain, and France, where it is a very rare surname. Measured by absolute frequency, the name is most common in India, Thailand, and France. Much less frequently, ธรัฐ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tharat | Canada, United States, Malaysia, Thailand, India |
| Tarrat | Argentina, United States, Thailand, France, Spain |
| ธรัฐ | Thailand |