The 2008 Karnataka Legislative Assembly election took place in three phases on 10, 16 and 22 May 2008 in all the 224 assembly constituencies in Karnataka, India. The elections were conducted to elect a Government in the state of Karnataka for the next five years. The votes were counted on 25 May and due to the use of electronic voting machines, all the results were out by the afternoon itself. The Bharatiya Janata Party emerged victorious winning 110 seats. Although the party fell short of a clear majority, it was able to form the government with the support of 6 independents. This was the first time BJP came to power on its own in Karnataka and any south Indian state.

The Bharatiya Janata Party is a political party in India and one of the two major Indian political parties alongside the Indian National Congress. Since 2014, it has been the ruling political party in India under the incumbent Prime Minister Narendra Modi. The BJP is aligned with right-wing politics and has close ideological and organisational links to the Rashtriya Swayamsevak Sangh (RSS) volunteer paramilitary organisation. Its policies adhere to Hindutva, a Hindu nationalist ideology. As of January 2024, it is the country's biggest political party in terms of representation in the Parliament of India as well as state legislatures.