Last name Costia (Costia 
) , around the globe, is a rare surname. The surname Costia is habitual in Romania, where it is a rare surname, Italy, where it is a very rare surname, and Argentina. Likewise, Costia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Costia | Romania, Italy, Argentina, France, Democratic Republic of the Congo |