The Elections to the Kerala Assembly took place in 2011 after the United Democratic Front (UDF) was routed by the Left Democratic Front (LDF) in the elections to the Lok Sabha held in 2009 and elections to the local self governments held in 2010 and certain realignment of forces during the period.
The Kerala Congress (J) quit the LDF and merged with the Kerala Congress (M) led by K. M. Mani prior to the Parliament elections. However, a faction of the Kerala Congress led by P. C. Thomas remained in the LDF. (The election commission gave it the name Kerala Congress (Anti-merger Group). The Kerala Congress group led by P. C. George had earlier merged with the Kerala Congress (M).
The Janata Dal (S) decided to quit the LDF following failure of seat sharing talks for the Parliament elections. However, the party split with the parent remaining in the LDF and the dominant group led by M. P. Veerendra Kumar joining the UDF assuming the name Socialist Janata (Democratic). Within the LDF, the Revolutionary Socialist Party-Bolshevik (RSP-B) merged with the RSP in 2008 while the Kerala RSP (Baby John) continued with the UDF.
Formation of the Nationalist Congress Party with support from the Congress (S) and subsequent merger of Democratic Indira Congress (DIC-K) with it had resulted in the NCP quitting the LDF. A Congress (S) faction remained in the LDF. However, after K. Karunakaran and his son K. Muraleedharan, who had formed the DIC-K left the NCP, the NCP returned to the LDF fold. Another development was the formal entry of Indian National League into the LDF.
The following are the seats contested by various parties in the UDF and LDF in the elections
Party wise break up of candidates
United Democratic Front
Left Democratic Front
Kerala Congress (Mani)
Socialist Janata (Democratic)
Janadhipatya Samrakshana Samithi
Kerala Congress (Jacob)
Communist Marxist Party
Kerala Congress (Balakrishna Pillai)
Revolutionary Socialist Party (Baby John)
Communist Party of India (Marxist)
Communist Party of India
Janata Dal (Secular)
Revolutionary Socialist Party
Nationalist Congress Party
Kerala Congress (Anti-merger Group)
Indian National League
Independents (CPI-M sponsored)
Total seats: 140. Bharatiya Janata Party- 138. Allies of BJP: Janata Dal (United)-1 & Independent- 1.