The Malabar Diocese, which covers western districts of Kerala, was formed in 1953.

Since 11 November 1966, Thomas Mar Timotheos became the diocesan head and later became Baselios Marthoma Didymus I,Catholicose of the East.

Some of the institutions functioning under the aegis of the diocese are the Aravanchal Estate near Payyannur, Krupa Deaddiction Centre at Erumamunda, St Thomas Ashram and Mission Centre at Attapadi, the Parumala Mar Gregorios Orthodox Guidance Center at Chevayur.

The diocesan journal Hermon Sandhesam has been published since 1997.There are 85 parishes in the diocese.

This article about the Malankara Orthodox Syrian Church is a stub.