Democratic Socialist Republic of Sri Lanka
- Native Name: ශ්රී ලංකා ප්රජාතාන්ත්රික සමාජවාදී ජනරජය
- Population: 21,919,000
- Region: Asia
- Sub Region: Southern Asia
- Capital: Sri Jayawardenepura Kotte
- Top Level Domain: .lk
- Currencies: Sri Lankan rupee
- Languages: Sinhala, Tamil