Last name Stelmack (Stelmack 
) , throughout the world, is a rare cognomen. The cognomen Stelmack is characteristic of Canada, where it is a rare surname, the United States, and New Zealand. Not in comparison with a country's population, this name is the most popular in the United States, Canada, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Stelmack | Canada, France, Brazil, New Zealand, United States |