The Theewaterskloof Local Municipality council consists of twenty-seven members elected by mixed-member proportional representation. Fourteen councillors are elected by first-past-the-post voting in fourteen wards. At the same time, the remaining thirteen are chosen from party lists so that the total number of party representatives is proportional to the number of votes received. In the election of 1 November 2021, no party won a majority.
The following table shows the composition of the council after past elections.
The following table shows the results of the 2000 election.
The following by-elections were held to fill vacant ward seats in the period between the election in December 2000 and the floor crossing period in October 2002.
In terms of the Eighth Amendment of the Constitution and the judgment of the Constitutional Court in United Democratic Movement v President of the Republic of South Africa and Others, in the period from 8âÂÂ22 October 2002 councillors had the opportunity to cross the floor to a different political party without losing their seats. In the Theewaterskloof council, four councillors from the Democratic Alliance (DA) crossed to the New National Party (NNP), which had formerly been part of the DA.
The following by-elections were held to fill vacant ward seats in the period between the floor crossing periods in October 2002 and September 2004.
Another floor-crossing period occurred on 1âÂÂ15 September 2004, in which three of the NNP councillors crossed to the ANC.
The following table shows the results of the 2006 election.
The following by-elections were held to fill vacant ward seats in the period between the election in March 2006 and the floor crossing period in September 2007.
The final floor-crossing period occurred on 1âÂÂ15 September 2007; floor-crossing was subsequently abolished in 2008 by the Fifteenth Amendment of the Constitution. In the Theewaterskloof council the single councillor representing the United Democratic Movement crossed to the Democratic Alliance.
The following by-elections were held to fill vacant ward seats in the period between the floor crossing period in September 2007 and the election in May 2011.
The following table shows the results of the 2011 election.
The following by-elections were held to fill vacant ward seats in the period between the elections in May 2011 and August 2016.
The following table shows the results of the 2016 election.
The local council sends five representatives to the council of the Overberg District Municipality: three from the Democratic Alliance and two from the African National Congress.
The following table shows the results of the 2021 election.
The African National Congress and the Patriotic Alliance (PA), supported by Good, formed a minority coalition, with the PA's Kallie Papier elected as mayor, Good's John Michels as deputy and the ANC's Derick Appel as speaker.
The following by-elections were held to fill vacant ward seats in the period since the election in November 2021.