Tourist arrivals to Sri Lanka were up 17.8 percent with 1.8 million visitors recorded in 2015, the tourism office said.
December arrivals grew 15.4 percent to 206,114 from a year ago with total annual arrivals at 1,798,380, provisional data from the tourism office showed.
Indian arrivals grew 30.3 percent to 316,247 in 2015 from the year before, with December arrivals rising 35.5 percent to 35,437.
China, came second with arrivals in 2015 up 67.6 percent to 214,783 while in December visitors grew 52.3 percent to 15,843 in December 2015 from a year ago.
Western European arrivals grew 15.3 percent to 552,442 in 2015 from the year before with arrivals from the United Kingdom rising 12.3 percent to 161,845 in 2015.