The Syro Malabar Catholic Eparchy of Kanjirappally-Nilackal is a Syro-Malabar Catholic eparchy with an area of 1980 km2 comprising the Kanjirappally taluk in Kottayam district and a few villages of the neighbouring taluks in Kottayam district, northern Pathanamthitta district, and parts of Idukki district of central Kerala in South India.

The Archeparchy of Changanacherry is a Syro-Malabar Catholic archeparchy with an area of 24,595 km2 comprising the districts of Kottayam, Alappuzha, Pathanamthitta, Kollam, and Thiruvananthapuram in Kerala, and also Kanyakumari district in Tamil Nadu. It is one of the largest Catholic dioceses in India in terms of area. Joseph Perumthottam is the current Metropolitan Archbishop, serving since 2007. Thomas Tharayil has been the auxiliary bishop since 2017. Suffragan eparchies of the Changanassery archeparchy includes Palai, Kanjirappally-Nilackal, and Thuckalay-Thiruvithancode.