It is a unicameral parliamentary body consisting of thirty councillors chosen during regional elections for a five-year term.

The board's current chief executive is Marshal Piotr Całbecki of Civic Coalition.

The Chairperson of the Assembly (Polish: Przewodniczący Sejmiku, speaker or president) presides over the Assembly in the chief leadership position, controlling the flow of legislation.

The Chairperson and two Vice-Chairpersons are elected by the coalition parties, followed by confirmation of the full Assembly on passage of a floor vote.

Members of the assembly are elected from six districts and serve five-year terms.