Tiruchirappalli (West) Assembly constituency, located entirely within the urban areas of Tiruchirappalli district of Tamil Nadu, forms part of the Tiruchirappalli Lok Sabha constituency. According to the 2011 Census estimates, the constituency has a population of 326,421, with Scheduled Castes accounting for 10.51 per cent and Scheduled Tribes for 0.17 per cent. The constituency is fully urban, with 100 per cent of its population classified as urban.
In the most recent Assembly election of 2021, KN Nehru of the DMK won the seat with 118,133 votes, representing 64.52 per cent of the vote share. He defeated AIADMK candidate V Padmanathan, who received 33,024 votes, by a margin of 85,109 votes, or 46.48 per cent.
Historically, KN Nehru has been a strong DMK candidate here, winning successive elections in 2016 and 2021. The constituency also saw a by-election in 2011, in which AIADMK’s Paranjothi M. won the seat.
The constituency is currently represented in the Tamil Nadu Legislative Assembly by KN Nehru (DMK), while the Tiruchirappalli Lok Sabha seat is represented in Parliament by Durai Vaiko of the MDMK.