Kollam district is a coastal district located in the southern part of the Indian state of Kerala. It is bordered by the Arabian Sea to the west, Pathanamthitta district to the north, Alappuzha district to the north-east, and Thiruvananthapuram district to the south. 

The district covers an area of 2,491 square kilometers and has a population of approximately 2.6 million people. The district is divided into two revenue divisions, Kollam and Punalur, and is further subdivided into 6 taluks and 5 assembly constituencies. 

Kollam district is known for its backwaters, beaches, and historical landmarks. The district has a long coastline of about 37 km, with numerous beaches and fishing villages. The backwaters of Ashtamudi Lake, which covers an area of 61.4 square km, are a major tourist attraction. The district is also home to several historical landmarks, including the Thangassery Fort, the Kollam Beach, and the Jatayu Earth's Center, which is the world's largest bird sculpture. 

The major rivers in Kollam district are the Kallada, Ithikkara, and Karamana rivers, which flow into the Ashtamudi Lake. Agriculture and fishing are the main sources of livelihood for the people of Kollam district, with coconut, paddy, and cashew nut being the major crops.