Thiyagarayanagar is the legislative assembly constituency located in the southern part of Chennai district of the Indian state of Tamil Nadu.

Its State Assembly Constituency number is 24.

It is a part of Chennai South parliamentary constituency during national elections.

It currently covers T. Nagar and adjacent localities, such as Pondy Bazaar, Kodambakkam, Ashok Nagar, KK Nagar, MGR Nagar, Vadapalani and West Mambalam.

[2] It is one of the 234 State Legislative Assembly Constituencies in Tamil Nadu.