Last name Mącznik (Mącznik 
) , throughout the world, is a very rare surname. The surname Mącznik is characteristic of Eastern Europe, particularly Poland, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Mącznik | Poland |
|
jakub mącznik Polish painter (1905-1945), PL (b. 1905) |
|
| aleksandra mącznik Polish researcher, PL |
|