The Democrat Party is a Thai political party. The oldest party in Thailand, it was founded as a royalist party; it now upholds a conservative and pro-market position.

Abhisit Vejjajiva is a Thai politician who was the prime minister of Thailand from 2008 to 2011. He was the leader of the Democrat Party from 2005 until he resigned following the party's weak performance in the 2019 election. As leader of the second largest party in the House of Representatives, he was also leader of the opposition – a position he held from 2005 to 2008 and again after his premiership until his party's en masse resignation from the House on 8 December 2013. As of 2023, Abhisit is the last prime minister to not come from the military or be related to the Shinawatra family.