The party wrested the prestigious Durgapur municipal corporation in Burdwan district and Dhupguri in north Bengal, breaking the Left strongholds for three decades, and captured the Nalhati municipal body in Birbhum district where Finance Minister Pranab Mukherjee's son Abhijit Mukherjee, local MLA, was an active campaigner for Congress.
The other success for Trinamool was in Panskura municipality in East Midnapore district where it was in power along with Congress.
Although Trinamool Congress and Congress are partners in UPA as also the state's ruling coalition, they had fought this year's civic poll on their own.
At Nalhati, it was a prestige fight for Congress. The party had captured power in the 2007 election but the civic board changed hands after some Congress councillors, led by its chairman, switched allegiance to Trinamool following the 2011 assembly polls.
In 2011 assembly election, Abhijit had secured a substantial lead in 14 out of 15 wards in the municipality, largely due to the alliance with Trinamool.
Trinamool, however, failed to take control of the Haldia municipality, the state's second richest civic body after the Kolkata municipal corporation.
The victory in Haldia is sweeter for the Left as local CPI-M strongman and former MP Lakshman Seth is now in jail in connection with an abduction-cum murder case of seven anti-land acquisition agitators in Nandigram.