Kothamangalam Social Service Society (KSSS) which is the official social development wing of the Diocese of Kothamangalam was established in 1967 as a registered charitable society. It caters to the Socially and economically disadvantaged sections in the society irrespective of caste, creed and community. Its operational area is spread over the two districts of Kerala namely, Idukki and Ernakulam.
Over the past five decades, the KSSS focused its attention mainly on the development of the highranges, which was newly settled by people from the plains due to poverty and starvation promoted by Grow More food program of state government. The diocese and the society stood by the people and gave leadership for the development of the newly. migrated area paying special attention to the needs of the socially and economically backward, marginal farmers, labourers, women and children, physically and mentally challenged and the tribal prone in this area.
Situated in the centre of Kerala, the KSSS's operational area lies extendsively in Ernakulam and Idukkii districts surrounded by the Archeparchy of Ernakulam-Angamaly, eparchies of Irinjalakuda, Idukki and Pala.The office of KSSS is the Pastoral centre, of the dioicese of Kothamangalam which is located near the Bishop's House at Kothamangalam.