The 1999 Brandenburg state election was held on 5 September 1999 to elect the members of the 3rd Landtag of Brandenburg. The incumbent Social Democratic Party (SPD) majority government led by Minister-President Manfred Stolpe lost its majority. The SPD subsequently formed a grand coalition with the Christian Democratic Union (CDU), and Stolpe continued as Minister-President.
The table below lists parties represented in the 2nd Landtag of Brandenburg.