| Country or Area | Year | Area | Sex | Record Type | Reliability | Source Year | Value | |
|---|
| Sri Lanka | 2022 | Total | Both Sexes | Estimate - de jure | Provisional figure with questionable reliability | 2023 | 22,180,987 |
| Sri Lanka | 2021 | Total | Both Sexes | Estimate - de jure | Provisional figure with questionable reliability | 2023 | 22,155,748 |
| Sri Lanka | 2020 | Total | Both Sexes | Estimate - de jure | Provisional figure with questionable reliability | 2023 | 21,919,415 |
| Sri Lanka | 2019 | Total | Both Sexes | Estimate - de jure | Provisional figure with questionable reliability | 2023 | 21,802,903 |
| Sri Lanka | 2018 | Total | Both Sexes | Estimate - de jure | Provisional figure with questionable reliability | 2023 | 21,669,511 |
| Sri Lanka | 2017 | Total | Both Sexes | Estimate - de jure | Provisional figure with questionable reliability | 2023 | 21,444,350 |
| Sri Lanka | 2016 | Total | Both Sexes | Estimate - de jure | Final figure, incomplete/questionable reliability | 2023 | 21,209,457 |
| Sri Lanka | 2015 | Total | Both Sexes | Estimate - de jure | Final figure, incomplete/questionable reliability | 2023 | 20,970,488 |
| Sri Lanka | 2014 | Total | Both Sexes | Estimate - de jure | Final figure, incomplete/questionable reliability | 2023 | 20,777,595 |
| Sri Lanka | 2013 | Total | Both Sexes | Estimate - de jure | Final figure, incomplete/questionable reliability | 2023 | 20,585,041 |
| Sri Lanka | 2012 | Total | Both Sexes | Census - de jure - complete tabulation | Final figure, complete | 2016 | 20,359,439 |
| Sri Lanka | 2012 | Total | Both Sexes | Estimate - de jure | Final figure, incomplete/questionable reliability | 2023 | 20,424,887 |
| Sri Lanka | 2011 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 20,892,000 |
| Sri Lanka | 2010 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 20,675,000 |
| Sri Lanka | 2009 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 20,476,000 |
| Sri Lanka | 2008 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 20,246,000 |
| Sri Lanka | 2007 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 20,039,000 |
| Sri Lanka | 2006 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 19,858,000 |
| Sri Lanka | 2005 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 19,644,497 |
| Sri Lanka | 2004 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 19,435,000 |
| Sri Lanka | 2003 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 19,173,083 |
| Sri Lanka | 2002 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 18,921,000 |
| Sri Lanka | 2001 | Total | Both Sexes | Census - de facto - complete tabulation | Final figure, complete | 2009 | 16,929,689 |
| Sri Lanka | 2001 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 18,797,000 |
| Sri Lanka | 2000 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 19,102,000 |
| Sri Lanka | 1999 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 19,056,000 |
| Sri Lanka | 1998 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 18,787,000 |
| Sri Lanka | 1997 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 18,568,000 |
| Sri Lanka | 1996 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 18,336,000 |
| Sri Lanka | 1995 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 18,136,000 |
| Sri Lanka | 1994 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 17,891,000 |
| Sri Lanka | 1993 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 17,646,000 |
| Sri Lanka | 1992 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 17,405,000 |
| Sri Lanka | 1991 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 17,267,000 |
| Sri Lanka | 1990 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 16,993,000 |
| Sri Lanka | 1989 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 16,806,000 |
| Sri Lanka | 1988 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 16,586,000 |
| Sri Lanka | 1987 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 16,361,000 |
| Sri Lanka | 1986 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 16,117,000 |
| Sri Lanka | 1985 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 15,842,000 |
| Sri Lanka | 1984 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 15,603,000 |
| Sri Lanka | 1983 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 15,417,000 |
| Sri Lanka | 1982 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 15,195,000 |
| Sri Lanka | 1981 | Total | Both Sexes | Census - de facto - complete tabulation | Final figure, complete | 1986 | 14,846,750 |
| Sri Lanka | 1981 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2023 | 15,011,000 |
| Sri Lanka | 1980 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2008 | 14,738,000 |
| Sri Lanka | 1979 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2008 | 14,472,000 |
| Sri Lanka | 1978 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2008 | 14,190,000 |
| Sri Lanka | 1977 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2008 | 13,942,000 |
| Sri Lanka | 1976 | Total | Both Sexes | Estimate - de facto | Final figure, incomplete/questionable reliability | 2008 | 13,717,000 |
