Ratnapura is a district in Sabaragamuwa Province, Sri Lanka. It is one of 25 districts of Sri Lanka, the second level administrative division of the country. The district is administered by a District Secretariat headed by a District Secretary (previously known as a Government Agent) appointed by the central government of Sri Lanka.
It covers an area of 3,275 km2, The district has a population of 1,082,277 according to 2012 Census. The city is located in the south-western part of Sri Lanka, the so-called wet zone. The town receives rainfall mainly from south-western monsoons from May to September. During the remaining months of the year, there is also considerable precipitation due to convective rains. The average annual precipitation is about 4,000 to 5,000 mm. The average temperature varies from 24 to 35 °C, and there are high humidity levels. The city is 21 m (69 ft) above sea level.
It is located on the Kalu Ganga (Black River) in south-central Sri Lanka, some 101 km (63 mi) southeast of the country's capital, Colombo. Ratnapura is also spelled as Rathnapura. The name 'Ratnapura' is a Sanskrit word meaning "city of gems", from the Sanskrit words pura (town) and ratna (gemstone). Many of the prominent gem dealers in Sri Lanka operate from this town. Apart from gem mining, the city is known for the production of rice and fruit. Large plantations of tea and rubber surround the city. Tea grown in this region is called low-country tea. There is a route to Sri Pada from Ratnapura direction. Excursions include Sinharaja Forest Reserve and Udawalawe National Park. The surrounding area is a popular trekking destination and a good place for bird watching.