The Parnawa Voivodeship was a unit of administrative division and local government in the Duchy of Livonia, part of the Polish–Lithuanian Commonwealth, since it was formed in 1598 until the Swedish conquest of Livonia in the 1620s. The seat of the voivode was Parnawa (Pärnu).
The voivodeship was created by King Zygmunt III Waza, and it was based on the Parnawa Presidency, created by King Stefan Batory in 1582, after the Truce of Yam-Zapolsky. It effectively ceased to exist in 1621, but officially, Parnawa Voivodeship existed until the Treaty of Oliva (1660). Its main towns were: Parnawa, Felin, Wolmar, Karkus, Salis, Lemsal, and Helme.