2005–06 Taiwanese local elections

Local elections were held in Taiwan on 3 December 2005 to elect magistrates of counties and mayors of cities, councillors in county/city councils and mayors of townships and cities, known as the three-in-one elections (Chinese: 三合一選舉), on 10 June 2006 to elect representatives in township/city councils and village chiefs (all except in Taipei City), on 9 December 2006 to elect mayors and councillors of special municipalities, and on 30 December 2006 to elect village chiefs in Taipei City.

The largest opposition party Kuomintang (KMT) replaced the governing Democratic Progressive Party (DPP) as the largest party at the local level. Kuomintang, together with other smaller parties in opposition, won control of 16 of the 23 counties and province-administered cities, most of the city and county councils, as well as most of the townships, towns and county-administered cities.

The party chairman of DPP Su Tseng-chang resigned following his promise on the eve of the elections. Premier Frank Hsieh has also submitted his resignation to President Chen Shui-bian, but Chen has stated that he does not plan to accept Hsieh's resignation. Hsieh finally resigned in 2006 and Su replaced him. Chairman Ma Ying-jeou pledged to resign if the KMT failed to win at least 11 of the magistrate and mayor positions and the results were considered a sign of confidence of Ma's leadership reinforced his position in the bid for the presidency in the 2008 presidential election.