Family name Mcgreg (Mcgreg 
) , throughout the world, is a very rare surname. The family name Mcgreg is habitual in New Zealand, where it is a very rare surname, Australia, and the United Kingdom, where it is an extremely rare surname. In absolute terms, the name is most common in Australia, Nigeria, and the United States. Much less frequently, Mcgreg is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mcgreg | Australia, New Zealand, United States, United Kingdom, Nigeria |