Piotrków Trybunalski, officially known as Constituency no. 10 (), is one of the 41 constituencies of the Sejm, the lower house of the Parliament of Poland, the national legislature of Poland. The constituency was established in 2001, after a major redistricting process across Poland. It is located in the Łódź Voivodeship and includes the area of two city counties: Piotrków Trybunalski and Skierniewice, as well as the counties of Bełchatów, Opoczno, Piotrków, Radomsko, Rawa Mazowiecka, Skierniewice and Tomaszów Mazowiecki.
The constituency currently elects 9 of the 460 members of the Sejm using the open party-list proportional representation electoral system. At the 2023 parliamentary election it had 540,069 citizens eligible to vote.
History.
The electoral district was created in 2001, due to redistricting process. It was a merger of two constituencies: Sejm Constituency no. 33 (no. 5 until 1993), which covered the area of the then-Piotrków Voivodeship, and the parts of Sejm Constituency no. 41 (created in 1993), which covered the area of the then-Skierniewice Voivodeship. This constituency is considered as one of the Law and Justice's safest districts, as they won every election there since 2005. Since 2015, PiS has maintained the majority of seats in this district.