The TMC on Sunday scored a simple majority in the West Bengal assembly, winning 148 of the 292 seats where polling was held.
According to the Election Commission website, the party was also leading in 63 other seats.
The state has a 294-member assembly but election was countermanded in Shamsherganj and Jangipur constituencies due to the death of candidates.
A party needed 147 seats for a simple majority in the House with an effective strength of 292.