Thrissur (also Trichur, Trissur) is a revenue district of Kerala in the central part of that state. Spanning an area of about 3,032 km2, Thrissur district is home to over 10% of Kerala’s population. Thrissur district was formed on July 1, 1949, with the headquarters at Thrissur City. Thrissur is known as the cultural capital of Kerala, and the land of Poorams. The district is famous for its ancient temples, churches, and mosques. Thrissur Pooram is the most colourful and spectacular temple festival in Kerala. The district was formed on July 1, 1949.

It is the densest district in Kerala with 1,509 inhabitants per square kilometre (3,910/sq mi). It is divided into six taluks: Thiruvananthapuram, Chirayinkeezhu, Neyyattinkara, Nedumangadu, Varkala and Kattakada. The urban bodies in the district are the Thiruvananthapuram Corporation, Varkala, Neyyattinkara, Attingal and Nedumangad municipalities.