Thoothukkudi Assembly constituency (Tamil: தூத்துக்குடி சட்டமன்ற தொகுதி) is one of the 234 state legislative assembly constituencies in Tamil Nadu in southern India. It is also one of the six state legislative assembly constituencies included in the Thoothukkudi Lok Sabha constituency. It is one of the oldest assembly segments in Tamil Nadu since Independence. Thoothukkudi was one of the 17 assembly constituencies to have VVPAT facilities with EVMs since the 2016 Tamil Nadu Legislative Assembly election.