The Silesian Voivodeship Sejmik (Polish: Sejmik Województwa Śląskiego) is the regional legislature of the Voivodeship of Silesia in Poland. It is a unicameral parliamentary body consisting of forty-five councillors elected for a five-year term. The current chairperson of the assembly is Mirosław Mazur of PO.^[1]

The assembly elects the executive board that acts as the collective executive for the regional government, headed by the voivodeship marshal. After the 2018 election, the Executive Board of Silesia was formed by Law and Justice and Wojciech Kałuża, independent councilor elected from the KO.^[2] But on November 21, 2022, four PiS councillors, including the incumbent Marshal, left the party and joined the opposition, giving them a majority. The board's current chief executive is Marshal Jakub Chełstowski of local movement "Tak! dla Polski" (until 21 November 2022 he was a member of PiS).^[3]

The Silesian Assembly convenes within the Silesian Parliament building in Katowice.

Members of the assembly are elected from seven districts, serve five-year terms. Districts does not have the constituencies formal names. Instead, each constituency has a number and territorial description.

• Polish Regional Assembly
• Silesian Voivodeship