Senate elections for a third of the members of the Senate (the constituencies 3, 6, 9 etc.) were held in the Czech Republic on 17 and 18 October 2008, with a second round on 24 and 25 October 2008. At least 180 candidates contested the 27 seats, and more than two thirds of the incumbents ran for another term – only seven retired.
Government parties (ODS and KDU-CSL; the Greens had no open seats) suffered massive loses – only 3 candidates (all ODS) were elected. The Opposition Czech Social Democratic Party won the election with 23 out of the 27 seats contested. The Civic Democratic Party lost its majority in the Senate (which was used to delay ratification of the Lisbon Treaty in the Czech Republic).