Cognomen Rusznica (Rusznica 
) , throughout the world, is a rare family name. The surname Rusznica is characteristic of Poland, where it is a rare surname, and the United States, where it is an extremely rare surname. More prevalently, Rusznica is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rusznica | Poland, United States |
| jan rusznica PL (b. 1929) |
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| stanisław rusznica Polish politician and deputy, PL (b. 1947) |
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| ewa rusznica badminton player, PL (b. 1960) |
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