Kannur district is located in the northern part of the Indian state of Kerala. It is bordered by the Arabian Sea to the west, Kasaragod district to the north, Wayanad district to the southeast, and Kozhikode district to the south. The district has a total area of 2,966 square kilometers and a population of over 2.5 million. 

The landscape of Kannur district is characterized by hills, valleys, rivers, and beaches. The Western Ghats run through the eastern part of the district, with the highest peak being Mount Katti Betta. The district also has several rivers, including the Valapattanam, Kuppam, and Mahe rivers, which provide water for irrigation and drinking purposes. 

Kannur district has a long coastline stretching over 98 kilometers, with several beaches including Payyambalam Beach, Muzhappilangad Beach, and Thottada Beach. The district also has several islands, including Dharmadam Island, which is a popular tourist destination.

The district is divided into three revenue divisions: Kannur, Thalassery, and Iritty. Kannur is the district headquarters and the largest city in the district. Other major towns in the district include Thalassery, Payyannur, and Taliparamba.