Prokop Sieniawski (d. 9 January 1627 in Lwów) was a Polish noble.

Prokop was son of Adam Hieronim Sieniawski and Katarzyna Kostka.

They had two sons: Aleksander who died shortly after his father in 1627 as a 4-years old child, and Adam Hieronim Sieniawski.

He was Royal Rotmistrz from 1621 onward and Court Chorąży of the Crown after 1622.

[2] Funeral oration of Prokop Sieniawski was told by his friend Jakub Sobieski.