Cognomen Osadca (Osadca 
, Осадца 
) , throughout the world, is a rare family name. The surname Osadca is characteristic of Ukraine, where it is quite a rare surname, Poland, where it is a rare surname, and Canada, where it is a very rare surname. Very seldom, Osadca is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Osadca | Germany, Norway, United States, Poland, Canada |
| Осадца | Kazakhstan, Ukraine, Belarus, Russia |
| jakub osadca Officer of the Polish Army (b. 1872) |
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| apollinaire osadca Ukrainian-American architect (1916-1997), US (b. 1916) |
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