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Population in Mongolia compared to Sri Lanka: Trends, Charts, Rankings

Updated on by Georank

The latest officially reported population of Mongolia was 3,568,978 in 2025 vs 21,756,000 people in Sri Lanka in 2025. In 2026, based on the adjusted UN estimation, the current Mongolia's population is 3,630,744 people compared to 21,926,160 in Sri Lanka.

Population statistics:

  • Sri Lanka's population is 6.04 times bigger than Mongolia's.
  • Mongolia is ranked the 132nd most populous country in the world, while Sri Lanka is the 63rd.
  • The countries together account for 0.31% of the world: 0.04% for Mongolia vs 0.26% for Sri Lanka.
  • For the last 10 years, Mongolia has had an average growth rate of +1.71% per year vs +0.42% in Sri Lanka.
  • Since 2006, the population of Mongolia has increased from 2.57M people to 3.63M (41.4% growth), while Sri Lanka has grown from 20.4M to 21.9M (7.73% growth).

Mongolia vs Sri Lanka: population by year and forecast

Mongolia
Factual

Projection
Sri Lanka
Factual

Projection
1x
Year Population
Mongolia Sri Lanka
2100 5,630,532 20,009,380
2099 5,624,298 20,121,095
2098 5,616,442 20,234,513
2097 5,607,739 20,345,619
2096 5,598,366 20,456,607
2095 5,587,141 20,566,246
2094 5,575,743 20,674,019
2093 5,563,600 20,780,946
2092 5,550,506 20,886,274
2091 5,537,031 20,990,047
2090 5,522,419 21,095,968
2089 5,507,083 21,198,788
2088 5,491,226 21,299,229
2087 5,475,425 21,398,269
2086 5,459,661 21,496,892
2085 5,442,388 21,594,661
2084 5,424,928 21,687,323
2083 5,406,747 21,778,597
2082 5,388,623 21,866,395
2081 5,369,593 21,954,337
2080 5,349,817 22,038,953
2079 5,329,240 22,122,744
2078 5,307,283 22,200,069
2077 5,286,383 22,274,355
2076 5,264,220 22,345,857
2075 5,241,700 22,414,609
2074 5,218,897 22,485,066
2073 5,195,622 22,550,427
2072 5,172,532 22,610,645
2071 5,149,066 22,669,042
2070 5,124,853 22,725,948
2069 5,101,195 22,779,050
2068 5,077,035 22,831,596
2067 5,052,818 22,885,941
2066 5,027,552 22,935,123
2065 5,002,655 22,985,942
2064 4,978,185 23,030,844
2063 4,953,806 23,071,114
2062 4,929,364 23,107,970
2061 4,904,690 23,139,924
2060 4,878,877 23,171,649
2059 4,852,963 23,199,387
2058 4,826,761 23,224,997
2057 4,799,120 23,247,211
2056 4,771,151 23,267,292
2055 4,742,184 23,278,653
2054 4,711,735 23,287,520
2053 4,679,745 23,297,347
2052 4,646,658 23,301,287
2051 4,612,090 23,302,108
2050 4,576,701 23,299,282
2049 4,539,215 23,293,630
2048 4,500,638 23,283,465
2047 4,460,511 23,267,251
2046 4,419,188 23,244,081
2045 4,376,222 23,212,221
2044 4,333,010 23,181,041
2043 4,289,776 23,144,217
2042 4,245,757 23,103,489
2041 4,201,838 23,056,478
2040 4,158,320 23,005,928
2039 4,115,023 22,948,866
2038 4,072,646 22,888,821
2037 4,030,644 22,822,943
2036 3,989,867 22,756,462
2035 3,950,239 22,685,766
2034 3,911,316 22,611,514
2033 3,873,353 22,532,374
2032 3,836,311 22,449,310
2031 3,800,027 22,364,063
2030 3,763,374 22,273,377
2029 3,726,490 22,181,300
2028 3,688,767 22,082,826
2027 3,650,012 21,979,196
2026 3,610,395 21,870,145
2025 3,568,978 21,756,000
2024 3,524,788 21,916,000
2023 3,481,145 22,037,000
2022 3,433,748 22,181,000
2021 3,383,741 22,156,000
2020 3,327,204 21,919,000
2019 3,267,673 21,803,000
2018 3,208,189 21,670,000
2017 3,148,917 21,453,000
2016 3,088,856 21,209,000
2015 3,026,864 20,970,000
2014 2,963,113 20,778,000
2013 2,899,011 20,585,000
2012 2,839,705 21,169,458
2011 2,786,317 21,009,048
2010 2,738,622 20,879,089
2009 2,691,115 20,756,435
2008 2,643,201 20,629,378
2007 2,601,850 20,492,545
2006 2,567,168 20,352,411
2005 2,536,407 20,216,524
2004 2,508,412 20,087,605
2003 2,480,374 19,951,521
2002 2,449,027 19,805,752
2001 2,417,751 19,600,362
2000 2,388,299 19,293,054
1999 2,356,813 18,944,731
1998 2,323,809 18,596,003
1997 2,291,750 18,248,200
1996 2,259,507 17,905,018
1995 2,224,945 17,564,068
1994 2,189,395 17,275,773
1993 2,165,130 17,025,918
1992 2,167,790 16,739,284
1991 2,165,342 16,475,354
1990 2,098,710 16,352,458
1989 2,124,185 16,248,557
1988 2,076,322 16,078,621
1987 2,022,800 15,916,576
1986 1,970,965 15,731,256
1985 1,921,514 15,544,154
1984 1,874,349 15,441,860
1983 1,829,092 15,388,794
1982 1,785,364 15,286,567
1981 1,742,857 15,099,414
1980 1,701,335 14,847,974
1979 1,660,659 14,579,614
1978 1,619,468 14,310,128
1977 1,576,245 14,049,371
1976 1,531,945 13,796,770
1975 1,488,296 13,548,984
1974 1,446,050 13,305,693
1973 1,405,502 13,060,916
1972 1,366,821 12,809,205
1971 1,330,071 12,551,910
1970 1,295,272 12,287,110
1969 1,262,284 12,013,858
1968 1,229,930 11,736,088
1967 1,196,996 11,457,328
1966 1,163,754 11,183,928
1965 1,131,177 10,916,965
1964 1,100,234 10,653,397
1963 1,071,362 10,395,040
1962 1,041,444 10,143,754
1961 1,009,284 9,899,372
1960 977,595 9,661,389

Data sources: United Nations | World Population Prospects (2026–2100, retrieved 2026-07-08); World Bank | Health (1960–2025, retrieved 2026-07-08).

GeoRank.org/population/mongolia/sri-lanka | CC BY

From 2006 to 2016, the population of Mongolia increased by 521,688 people (a 20.3% growth), while Sri Lanka gained 856,589 people (a 4.21% growth).

For the next 10 years, from 2016 to 2026, Mongolia gained 541,888 people (a 17.5% growth), while Sri Lanka's population increased by 717,160 people (a 3.38% growth).

Mongolia was ranked 137th most populous country in 2006 and is 132nd in 2026. Sri Lanka was ranked 55th in 2006 and ranked 63rd now.

The UN's World Population Prospects forecasts that in 24 years (in 2050) Mongolia's population will grow by 26.1% to 4,576,701 people with a rank change from 132nd to 130th. The population of Sri Lanka will increase by 6.26% to 23,299,282 people and rank change from 63rd to 71st.

Mongolia is projected to reach its peak in 2100 at 5.63M people compared to the peak of 23.3M people in 2051 for Sri Lanka.

Population growth rate by year

Mongolia
Factual

Projection
Sri Lanka
Factual

Projection
1x
Year Growth rate
Mongolia Sri Lanka
2100 0.11% -0.56%
2099 0.14% -0.56%
2098 0.16% -0.55%
2097 0.17% -0.54%
2096 0.2% -0.53%
2095 0.2% -0.52%
2094 0.22% -0.51%
2093 0.24% -0.5%
2092 0.24% -0.49%
2091 0.26% -0.5%
2090 0.28% -0.49%
2089 0.29% -0.47%
2088 0.29% -0.46%
2087 0.29% -0.46%
2086 0.32% -0.45%
2085 0.32% -0.43%
2084 0.34% -0.42%
2083 0.34% -0.4%
2082 0.35% -0.4%
2081 0.37% -0.38%
2080 0.39% -0.38%
2079 0.41% -0.35%
2078 0.4% -0.33%
2077 0.42% -0.32%
2076 0.43% -0.31%
2075 0.44% -0.31%
2074 0.45% -0.29%
2073 0.45% -0.27%
2072 0.46% -0.26%
2071 0.47% -0.25%
2070 0.46% -0.23%
2069 0.48% -0.23%
2068 0.48% -0.24%
2067 0.5% -0.21%
2066 0.5% -0.22%
2065 0.49% -0.19%
2064 0.49% -0.17%
2063 0.5% -0.16%
2062 0.5% -0.14%
2061 0.53% -0.14%
2060 0.53% -0.12%
2059 0.54% -0.11%
2058 0.58% -0.1%
2057 0.59% -0.09%
2056 0.61% -0.05%
2055 0.65% -0.04%
2054 0.68% -0.04%
2053 0.71% -0.02%
2052 0.75% -0.004%
2051 0.77% 0.01%
2050 0.83% 0.02%
2049 0.86% 0.04%
2048 0.9% 0.07%
2047 0.94% 0.1%
2046 0.98% 0.14%
2045 1% 0.13%
2044 1.01% 0.16%
2043 1.04% 0.18%
2042 1.05% 0.2%
2041 1.05% 0.22%
2040 1.05% 0.25%
2039 1.04% 0.26%
2038 1.04% 0.29%
2037 1.02% 0.29%
2036 1% 0.31%
2035 1% 0.33%
2034 0.98% 0.35%
2033 0.97% 0.37%
2032 0.95% 0.38%
2031 0.97% 0.41%
2030 0.99% 0.42%
2029 1.02% 0.45%
2028 1.06% 0.47%
2027 1.1% 0.5%
2026 1.16% 0.52%
2025 1.25% -0.73%
2024 1.25% -0.55%
2023 1.38% -0.65%
2022 1.48% 0.11%
2021 1.7% 1.08%
2020 1.82% 0.53%
2019 1.85% 0.61%
2018 1.88% 1.01%
2017 1.94% 1.15%
2016 2.05% 1.14%
2015 2.15% 0.92%
2014 2.21% 0.94%
2013 2.09% -2.76%
2012 1.92% 0.76%
2011 1.74% 0.62%
2010 1.77% 0.59%
2009 1.81% 0.62%
2008 1.59% 0.67%
2007 1.35% 0.69%
2006 1.21% 0.67%
2005 1.12% 0.64%
2004 1.13% 0.68%
2003 1.28% 0.74%
2002 1.29% 1.05%
2001 1.23% 1.59%
2000 1.34% 1.84%
1999 1.42% 1.88%
1998 1.4% 1.91%
1997 1.43% 1.92%
1996 1.55% 1.94%
1995 1.62% 1.67%
1994 1.12% 1.47%
1993 -0.12% 1.71%
1992 0.11% 1.6%
1991 3.17% 0.75%
1990 -1.2% 0.64%
1989 2.31% 1.06%
1988 2.65% 1.02%
1987 2.63% 1.18%
1986 2.57% 1.2%
1985 2.52% 0.66%
1984 2.47% 0.34%
1983 2.45% 0.67%
1982 2.44% 1.24%
1981 2.44% 1.69%
1980 2.45% 1.84%
1979 2.54% 1.88%
1978 2.74% 1.86%
1977 2.89% 1.83%
1976 2.93% 1.83%
1975 2.92% 1.83%
1974 2.88% 1.87%
1973 2.83% 1.97%
1972 2.76% 2.05%
1971 2.69% 2.16%
1970 2.61% 2.27%
1969 2.63% 2.37%
1968 2.75% 2.43%
1967 2.86% 2.44%
1966 2.88% 2.45%
1965 2.81% 2.47%
1964 2.69% 2.49%
1963 2.87% 2.48%
1962 3.19% 2.47%
1961 3.24% 2.46%

Data sources: United Nations | World Population Prospects (2026–2100, retrieved 2026-07-08); World Bank | Health (1961–2025, retrieved 2026-07-08).

GeoRank.org/population/mongolia/sri-lanka | CC BY

In 2025, the population of Mongolia grew by 1.25%, while Sri Lanka's population declined by 0.73%.

Live population counters

Mongolia Sri Lanka
Current population
3630744
21926160
Population rank 132/197 63/197
Percent of world population 0.04% 0.26%
One net population change
11.9 minutes
3.29 minutes
One birth every
8.82 minutes
2.37 minutes
One death every
27.1 minutes
3.07 minutes
Daily growth/decline +121 -438
Annual growth/decline +44,190 -160,000
Annual growth/decline rate +1.25% -0.73%
Population growth rate rank 81/197 190/197
One migration net change every
4.63 days
17.2 minutes
Annual migration change +79 -30,724
Net migration rank 74/196 165/196
Foreign-born residents 22,589 40,698
Foreign-born residents rank 169/195 156/195
Foreign-born share of population 0.6% 0.2%
Foreign-born share rank 171/195 190/195

Natural population change vs migration

Mongolia
Natural

Migration
Sri Lanka
Natural

Migration
1x
Year Population change
Mongolia Sri Lanka
Natural Migration Natural Migration
2025 - 79 - -30,724
2024 40,182 83 50,407 -27,245
2023 46,995 0 66,111 -28,011
2022 47,730 0 95,378 -27,435
2021 52,109 0 121,858 -29,586
2020 60,888 0 170,968 -29,875
2019 61,433 8,660 172,243 -28,426
2018 60,635 7,811 183,610 -28,607
2017 57,940 6,831 187,993 -22,324
2016 62,086 5,633 194,232 -18,388
2015 64,473 4,307 201,815 -29,797
2014 66,078 2,921 211,541 -33,672
2013 62,618 1,505 221,021 -37,754
2012 55,942 351 229,138 -41,955
2011 50,711 -505 224,461 -90,839
2010 44,914 -6,444 224,325 -98,060
2009 48,876 -15,007 200,175 -81,130
2008 45,843 -17,277 232,225 -97,144
2007 39,636 -15,220 248,287 -109,695
2006 33,609 -11,934 248,706 -107,045
2005 29,290 -8,924 248,683 -118,594
2004 28,418 -8,148 212,527 -84,795
2003 28,827 -7,986 252,008 -107,573
2002 30,439 -8,934 252,840 -105,718
2001 32,052 -10,244 244,377 19,273
2000 32,753 -11,241 227,060 123,894
1999 32,283 -13,481 206,876 138,799
1998 31,757 -10,315 201,059 150,724
1997 32,403 -9,132 208,193 135,636
1996 33,741 -8,626 215,290 127,236
1995 34,473 -7,346 221,957 117,416
1994 34,711 -5,449 228,904 8,323
1993 36,924 -5,429 226,257 36,232
1992 42,437 -8,404 222,230 88,542
1991 47,884 -11,427 218,117 -1,047
1990 49,443 -11,881 224,454 -195,736
1989 51,420 -9,757 212,401 -33,305
1988 51,588 2,459 219,184 -58,415
1987 51,140 1,855 226,414 -63,105
1986 50,329 354 233,782 -26,460
1985 49,944 -1,719 247,836 -80,950
1984 48,562 -2,452 263,175 -225,450
1983 46,919 -2,522 277,768 -209,362
1982 45,179 -2,132 300,030 -163,987
1981 43,588 -1,615 328,096 -89,824
1980 42,343 -1,268 328,155 -63,541
1979 41,568 -1,296 329,791 -57,683
1978 40,276 1,833 317,055 -50,189
1977 38,995 5,354 300,038 -45,383
1976 37,670 6,577 291,816 -41,258
1975 36,490 6,556 282,496 -37,475
1974 35,297 6,153 275,521 -33,979
1973 33,993 5,647 278,577 -30,582
1972 32,727 4,999 282,494 -27,071
1971 31,536 4,238 281,200 -22,021
1970 30,558 3,263 286,719 -16,299
1969 29,781 2,366 286,218 -10,152
1968 29,017 3,535 286,642 -7,163
1967 28,178 5,139 284,738 -6,696
1966 27,338 5,837 275,549 -6,794
1965 26,364 5,610 272,422 -7,249
1964 25,317 4,599 269,584 -7,614
1963 24,142 3,687 262,880 -8,118
1962 22,960 9,049 256,719 -8,909
1961 21,873 10,440 251,087 -10,144
1960 20,726 10,334 247,631 -12,610

Data sources: World Bank | Health (1960–2025, retrieved 2026-07-08).

GeoRank.org/population/mongolia/sri-lanka | CC BY

Over the last 10 years, 94.3% of the population change in Mongolia is from natural causes (a gain of 554,471 people) and 5.67% is from migration (a gain of 33,325 people). In Sri Lanka 84.3% is from natural causes (a gain of 1,444,615 people) and 15.7% is from migration (a loss of 269,694 people).

As of 2024, 22,589 residents or 0.6% of the population were not native-born in Mongolia, compared to 40,698 people or 0.2% in Sri Lanka.

Biggest cities by population

Mongolia
City Population
Ulaanbaatar 1.4M
Bulgan 12.3K
Sri Lanka
City Population
Colombo 648K
Gampaha 191K
Beruwala 165K
Negombo 142K
Kandy 120K
Sri Jayawardenepura Kotte 116K
Trincomalee 99.1K
Galle 93.1K
Matara 68.2K
Anuradhapura 63.2K

Compare countries by 7 more topics

Population map with other countries

1x

Data sources: World Bank | Health (1960–2025, retrieved 2026-07-08); United Nations | World Population Prospects (1960–2026, retrieved 2026-07-08); U.S. Census Bureau (1960–2025, retrieved 2026-07-08); Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-07-08).

GeoRank.org/population/mongolia/sri-lanka | CC BY

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Data sources:

  1. World Bank | Health (1960–2025, retrieved 2026-07-08)
  2. United Nations | World Population Prospects (1960–2100, retrieved 2026-07-08)
  3. U.S. Census Bureau (1960–2025, retrieved 2026-07-08)
  4. Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-07-08)
  5. Wikidata (2026, retrieved 2026-07-08)

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