Cognomen Macsmith (Macsmith 
) , across the world, is a very rare family name. The last name Macsmith is characteristic of Australia, where it is a very rare surname, the United Kingdom, where it is an extremely rare surname, and the United States. Not in comparison with a country's population, it is the most numerous in Australia, the United States, and Nigeria.
| VARIANT | COUNTRY |
|---|---|
| Macsmith | Australia, United Kingdom, Nigeria, United States |