The smallest district of Sri Lanka is Mannar district, with an area of 1,210 square kilometers (467 sq mi). The district is located in the Northern Province, and its capital is Mannar town. Here are the other smallest districts in Sri Lanka, in terms of area: Ampara District: 2,213 square kilometers (856 sq mi) Trincomalee District: 2,268 square kilometers (876 sq mi) Polonnaruwa District: 2,309 square kilometers (892 sq mi) Jaffna District: 2,529 square kilometers (976 sq mi) Kilinochchi District: 2,583 square kilometers (998 sq mi) The smallest district in terms of population is Nuwara Eliya district, with a population of 267,176 people. The largest district in terms of population is Colombo district, with a population of 5,648,337 people.