| Petrůvka Piotrówka | |
| Mouth Coordinates: | 49.9114°N 18.4789°W |
| Subdivision Type1: | Countries |
| Length: | 31km (19miles) |
(Polish:) is a 31 km long river originating in Poland but flowing mostly through Karviná District, Moravian-Silesian Region, Czech Republic. It is the right tributary of the Olza River, to which it enters in Závada (part of Petrovice u Karviné).
It begins in vicinity of Cieszyn (Pastwiska) and then flows north through Hażlach, Kończyce Wielkie, Kończyce Małe, Zebrzydowice, where it veers west towards Marklowice Górne, Dolní Marklovice, Petrovice u Karviné and Závada.