Kerala Postal & Telegraph Circle was formed on the 1st July 1961, bifurcating the then Madras Circle. Prior to integration with Indian Post Offices on 1st April 1951, there were separate postal systems in the former states of Travancore and Kochi called 'Anchal Service'. The Anchal Service was meant for communication within the State only. Indian P & T Department also had its own Posts and Telegraph Offices in these States. Consequent on integration of the 'Anchal Service', all the then existing Anchal Offices were either amalgamated to the nearby Indian Post Offices or re-designated as Post Offices in the same location.

       On formation of a separate Circle in 1961 for the whole state of Kerala, the development of the Post and Telegraph services in the state got accelerated. The Circle was initially under the charge of the Director, Posts and Telegraphs. With effect from 25th February 1965, the Circle was upgraded into a major Circle and placed under the charge of a Postmaster General. The functional bifurcation of the P & T Circles in the year 1974 took place in Kerala also. Accordingly, on 1st September 1974, Kerala Postal Circle came into existence.

Kerala Postal Circle is divided into 03 (three) regions viz. Trivandrum HQ Region, Kochi Region and Calicut Region comprising field units, called Divisions (Postal / RMS Divisions). Each Region is headed by a Postmaster General.

Trivandrum HQ Region consists of 05 Postal Divisions and 1 RMS Division.

Thiruvananthapuram North
Thiruvananthapuram South
Kollam
Pathanamthitta
Tiruvalla
RMS 'TV' Division

Kochi Region Consists of 10 Postal Divisions and 1 RMS Division.

Alappuzha
Aluva
Changancherry
Eranakulam
Idukki
Irinjalakuda
Kottayam
Lakshadweep
Mavelikara
Thrissur
RMS 'EK' Division

Calicut Region 09 Postal Divisions and 1 RMS Division.

Kannur
Kasaragod
Kozhikode
Manjeri
Ottapalam
Palakkad
Thalassery
Tirur
Vadakara
RMS 'CT' Division