P. J. Joseph is an Indian politician, the leader of the Kerala Congress party in Kerala, and an MLA, representing the Thodupuzha assembly constituency. Since 1990 his party had been part of the Left Democratic Front (LDF) as an alliance. He has also held various ministerial positions with the Government of Kerala on several occasions. On 30 April 2010, P. J. Joseph resigned from the LDF government and declared his party's merger with K. M. Mani's Kerala Congress (M).