Located in Thanjavur district, Thiruvidaimarudur is a Reserved (SC) constituency that has consistently supported the DMK in recent years. In the 2021 Assembly elections, DMK’s Govi. Chezhiaan won the seat with 95,763 votes, defeating AIADMK’s Union S. Veeramani, who secured 85,083 votes. The margin of victory was 10,680 votes. In the 2016 Assembly elections, DMK’s Govi. Chezhiaan won with 85,764 votes, defeating AIADMK’s U. Settu, who received 85,372 votes. The margin of victory was a razor-thin 392 votes. In the 2011 Assembly elections, DMK’s Govi. Chezhiaan won the seat with 77,175 votes, defeating AIADMK’s T. Pandiyarajan, who secured 71,781 votes. The margin of victory was 5,394 votes.