Irinjalakuda is governed by Irinjalakuda Municipality. The municipality was formed on 8 February 1936 with an area of 11.24 square kilometres. K.I. Varunny was the first municipal chairman and the municipality was divided into 22 electoral wards. Now, the Municipality has 41 wards. [9] Irinjalakuda is the headquarters of the Mukundapuram Taluk and is a Grade-I municipality.[5]

Irinjalakuda Revenue Division was formed in May 2018. It is headed by a Revenue Divisional Officer (RDO). The office is situated at Mini Civil Station Annexe building. The revenue division comprises the taluks of Mukundapuram, Chalakudy and Kodungallur. There is a court complex inside the Civil Station that houses Sub Court, Additional Sub Court, Munsif Courts and Motor Accidents Claims Tribunal (MACT)/ Additional District and Sessions Court. Irinjalakuda also has a Family Court. A special fast track court to try POCSO cases and crimes against women was inaugurated here on January 4, 2021. A new judicial complex is under construction near the civil station to house all judicial offices in the town. Irinjalakuda judicial first class magistrate court is functioning at old court complex in Kacheri Valappu.

Irinjalakuda has a special sub jail, which is function ing near the civil station complex. A land tribunal to provide land deeds and to dispose of land transfer disputes is functioning at the civil station. The tribunal started functioning in 2019.