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Population in Mongolia compared to South Korea: Trends, Charts, Rankings

Updated on by Georank

The latest officially reported population of Mongolia was 3,568,978 in 2025 vs 51,684,564 people in South Korea in 2025. In 2026, based on the adjusted UN estimation, the current Mongolia's population is 3,630,744 people compared to 51,624,449 in South Korea.

Population statistics:

  • South Korea's population is 14.2 times bigger than Mongolia's.
  • Mongolia is ranked the 132nd most populous country in the world, while South Korea is the 31st.
  • The countries together account for 0.66% of the world: 0.04% for Mongolia vs 0.62% for South Korea.
  • For the last 10 years, Mongolia has had an average growth rate of +1.71% per year vs +0.17% in South Korea.
  • Since 2006, the population of Mongolia has increased from 2.57M people to 3.63M (41.4% growth), while South Korea has grown from 48.4M to 51.6M (6.58% growth).

Mongolia vs South Korea: population by year and forecast

Mongolia
Factual

Projection
South Korea
Factual

Projection
1x
Year Population
Mongolia South Korea
2100 5,630,532 22,001,649
2099 5,624,298 22,324,514
2098 5,616,442 22,657,541
2097 5,607,739 22,998,315
2096 5,598,366 23,348,632
2095 5,587,141 23,711,049
2094 5,575,743 24,081,510
2093 5,563,600 24,460,970
2092 5,550,506 24,848,715
2091 5,537,031 25,242,926
2090 5,522,419 25,642,926
2089 5,507,083 26,048,094
2088 5,491,226 26,457,020
2087 5,475,425 26,871,556
2086 5,459,661 27,288,450
2085 5,442,388 27,710,065
2084 5,424,928 28,133,600
2083 5,406,747 28,564,090
2082 5,388,623 28,998,646
2081 5,369,593 29,441,497
2080 5,349,817 29,887,135
2079 5,329,240 30,337,095
2078 5,307,283 30,793,984
2077 5,286,383 31,258,278
2076 5,264,220 31,728,826
2075 5,241,700 32,205,338
2074 5,218,897 32,689,892
2073 5,195,622 33,180,187
2072 5,172,532 33,679,874
2071 5,149,066 34,187,068
2070 5,124,853 34,702,204
2069 5,101,195 35,224,472
2068 5,077,035 35,745,164
2067 5,052,818 36,274,411
2066 5,027,552 36,808,495
2065 5,002,655 37,349,660
2064 4,978,185 37,897,742
2063 4,953,806 38,450,082
2062 4,929,364 39,009,227
2061 4,904,690 39,565,102
2060 4,878,877 40,130,032
2059 4,852,963 40,692,438
2058 4,826,761 41,256,780
2057 4,799,120 41,813,259
2056 4,771,151 42,356,530
2055 4,742,184 42,888,143
2054 4,711,735 43,405,840
2053 4,679,745 43,917,075
2052 4,646,658 44,419,192
2051 4,612,090 44,901,452
2050 4,576,701 45,362,931
2049 4,539,215 45,809,553
2048 4,500,638 46,235,718
2047 4,460,511 46,645,885
2046 4,419,188 47,033,200
2045 4,376,222 47,409,815
2044 4,333,010 47,773,842
2043 4,289,776 48,120,989
2042 4,245,757 48,455,085
2041 4,201,838 48,782,206
2040 4,158,320 49,091,438
2039 4,115,023 49,388,464
2038 4,072,646 49,669,835
2037 4,030,644 49,932,869
2036 3,989,867 50,175,947
2035 3,950,239 50,401,135
2034 3,911,316 50,607,994
2033 3,873,353 50,796,030
2032 3,836,311 50,961,878
2031 3,800,027 51,109,725
2030 3,763,374 51,242,628
2029 3,726,490 51,360,529
2028 3,688,767 51,461,403
2027 3,650,012 51,551,313
2026 3,610,395 51,624,449
2025 3,568,978 51,684,564
2024 3,524,788 51,751,065
2023 3,481,145 51,712,619
2022 3,433,748 51,672,569
2021 3,383,741 51,769,539
2020 3,327,204 51,836,239
2019 3,267,673 51,764,822
2018 3,208,189 51,585,058
2017 3,148,917 51,361,911
2016 3,088,856 51,217,803
2015 3,026,864 51,014,947
2014 2,963,113 50,746,659
2013 2,899,011 50,428,893
2012 2,839,705 50,199,853
2011 2,786,317 49,936,638
2010 2,738,622 49,554,112
2009 2,691,115 49,307,835
2008 2,643,201 49,054,708
2007 2,601,850 48,683,638
2006 2,567,168 48,438,292
2005 2,536,407 48,184,561
2004 2,508,412 48,082,519
2003 2,480,374 47,892,330
2002 2,449,027 47,644,736
2001 2,417,751 47,370,164
2000 2,388,299 47,008,111
1999 2,356,813 46,616,677
1998 2,323,809 46,286,503
1997 2,291,750 45,953,580
1996 2,259,507 45,524,681
1995 2,224,945 45,092,991
1994 2,189,395 44,641,540
1993 2,165,130 44,194,628
1992 2,167,790 43,747,962
1991 2,165,342 43,295,704
1990 2,098,710 42,869,283
1989 2,124,185 42,449,038
1988 2,076,322 42,031,247
1987 2,022,800 41,621,690
1986 1,970,965 41,213,674
1985 1,921,514 40,805,744
1984 1,874,349 40,405,956
1983 1,829,092 39,910,403
1982 1,785,364 39,326,352
1981 1,742,857 38,723,248
1980 1,701,335 38,123,775
1979 1,660,659 37,534,236
1978 1,619,468 36,969,185
1977 1,576,245 36,411,795
1976 1,531,945 35,848,523
1975 1,488,296 35,280,725
1974 1,446,050 34,692,266
1973 1,405,502 34,103,149
1972 1,366,821 33,505,406
1971 1,330,071 32,882,704
1970 1,295,272 32,240,827
1969 1,262,284 31,544,266
1968 1,229,930 30,838,302
1967 1,196,996 30,130,983
1966 1,163,754 29,435,571
1965 1,131,177 28,704,674
1964 1,100,234 27,984,155
1963 1,071,362 27,261,747
1962 1,041,444 26,513,030
1961 1,009,284 25,765,673
1960 977,595 25,012,374

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/south-korea | CC BY

From 2006 to 2016, the population of Mongolia increased by 521,688 people (a 20.3% growth), while South Korea gained 2,779,511 people (a 5.74% growth).

For the next 10 years, from 2016 to 2026, Mongolia gained 541,888 people (a 17.5% growth), while South Korea's population increased by 406,646 people (a 0.79% growth).

Mongolia was ranked 137th most populous country in 2006 and is 132nd in 2026. South Korea was ranked 25th in 2006 and ranked 31st 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 South Korea will decrease by 12.1% to 45,362,931 people and rank change from 31st to 48th.

Mongolia is projected to reach its peak in 2100 at 5.63M people, while South Korea's population already peaked in 2020 at 51.8M people and is projected to decrease to 22M people by 2100.

Population growth rate by year

Mongolia
Factual

Projection
South Korea
Factual

Projection
1x
Year Growth rate
Mongolia South Korea
2100 0.11% -1.45%
2099 0.14% -1.47%
2098 0.16% -1.48%
2097 0.17% -1.5%
2096 0.2% -1.53%
2095 0.2% -1.54%
2094 0.22% -1.55%
2093 0.24% -1.56%
2092 0.24% -1.56%
2091 0.26% -1.56%
2090 0.28% -1.56%
2089 0.29% -1.55%
2088 0.29% -1.54%
2087 0.29% -1.53%
2086 0.32% -1.52%
2085 0.32% -1.51%
2084 0.34% -1.51%
2083 0.34% -1.5%
2082 0.35% -1.5%
2081 0.37% -1.49%
2080 0.39% -1.48%
2079 0.41% -1.48%
2078 0.4% -1.49%
2077 0.42% -1.48%
2076 0.43% -1.48%
2075 0.44% -1.48%
2074 0.45% -1.48%
2073 0.45% -1.48%
2072 0.46% -1.48%
2071 0.47% -1.48%
2070 0.46% -1.48%
2069 0.48% -1.46%
2068 0.48% -1.46%
2067 0.5% -1.45%
2066 0.5% -1.45%
2065 0.49% -1.45%
2064 0.49% -1.44%
2063 0.5% -1.43%
2062 0.5% -1.4%
2061 0.53% -1.41%
2060 0.53% -1.38%
2059 0.54% -1.37%
2058 0.58% -1.33%
2057 0.59% -1.28%
2056 0.61% -1.24%
2055 0.65% -1.19%
2054 0.68% -1.16%
2053 0.71% -1.13%
2052 0.75% -1.07%
2051 0.77% -1.02%
2050 0.83% -0.97%
2049 0.86% -0.92%
2048 0.9% -0.88%
2047 0.94% -0.82%
2046 0.98% -0.79%
2045 1% -0.76%
2044 1.01% -0.72%
2043 1.04% -0.69%
2042 1.05% -0.67%
2041 1.05% -0.63%
2040 1.05% -0.6%
2039 1.04% -0.57%
2038 1.04% -0.53%
2037 1.02% -0.48%
2036 1% -0.45%
2035 1% -0.41%
2034 0.98% -0.37%
2033 0.97% -0.33%
2032 0.95% -0.29%
2031 0.97% -0.26%
2030 0.99% -0.23%
2029 1.02% -0.2%
2028 1.06% -0.17%
2027 1.1% -0.14%
2026 1.16% -0.12%
2025 1.25% -0.13%
2024 1.25% 0.07%
2023 1.38% 0.08%
2022 1.48% -0.19%
2021 1.7% -0.13%
2020 1.82% 0.14%
2019 1.85% 0.35%
2018 1.88% 0.43%
2017 1.94% 0.28%
2016 2.05% 0.4%
2015 2.15% 0.53%
2014 2.21% 0.63%
2013 2.09% 0.46%
2012 1.92% 0.53%
2011 1.74% 0.77%
2010 1.77% 0.5%
2009 1.81% 0.52%
2008 1.59% 0.76%
2007 1.35% 0.51%
2006 1.21% 0.53%
2005 1.12% 0.21%
2004 1.13% 0.4%
2003 1.28% 0.52%
2002 1.29% 0.58%
2001 1.23% 0.77%
2000 1.34% 0.84%
1999 1.42% 0.71%
1998 1.4% 0.72%
1997 1.43% 0.94%
1996 1.55% 0.96%
1995 1.62% 1.01%
1994 1.12% 1.01%
1993 -0.12% 1.02%
1992 0.11% 1.04%
1991 3.17% 0.99%
1990 -1.2% 0.99%
1989 2.31% 0.99%
1988 2.65% 0.98%
1987 2.63% 0.99%
1986 2.57% 1%
1985 2.52% 0.99%
1984 2.47% 1.24%
1983 2.45% 1.49%
1982 2.44% 1.56%
1981 2.44% 1.57%
1980 2.45% 1.57%
1979 2.54% 1.53%
1978 2.74% 1.53%
1977 2.89% 1.57%
1976 2.93% 1.61%
1975 2.92% 1.7%
1974 2.88% 1.73%
1973 2.83% 1.78%
1972 2.76% 1.89%
1971 2.69% 1.99%
1970 2.61% 2.21%
1969 2.63% 2.29%
1968 2.75% 2.35%
1967 2.86% 2.36%
1966 2.88% 2.55%
1965 2.81% 2.57%
1964 2.69% 2.65%
1963 2.87% 2.82%
1962 3.19% 2.9%
1961 3.24% 3.01%

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/south-korea | CC BY

In 2025, the population of Mongolia grew by 1.25%, while South Korea's population declined by 0.13%.

Live population counters

Mongolia South Korea
Current population
3630744
51624449
Population rank 132/197 31/197
Percent of world population 0.04% 0.62%
One net population change
11.9 minutes
7.93 minutes
One birth every
8.82 minutes
2.16 minutes
One death every
27.1 minutes
1.45 minutes
Daily growth/decline +121 -182
Annual growth/decline +44,190 -66,501
Annual growth/decline rate +1.25% -0.13%
Population growth rate rank 81/197 169/197
One migration net change every
4.63 days
8.02 minutes
Annual migration change +79 +65,731
Net migration rank 74/196 20/196
Foreign-born residents 22,589 1,811,507
Foreign-born residents rank 169/195 40/195
Foreign-born share of population 0.6% 3.5%
Foreign-born share rank 171/195 111/195

Natural population change vs migration

Mongolia
Natural

Migration
South Korea
Natural

Migration
1x
Year Population change
Mongolia South Korea
Natural Migration Natural Migration
2025 - 79 - 65,731
2024 40,182 83 -119,027 75,963
2023 46,995 0 -124,111 87,800
2022 47,730 0 -124,014 87,800
2021 52,109 0 -56,947 -16,778
2020 60,888 0 -31,101 112,631
2019 61,433 8,660 10,353 128,622
2018 60,635 7,811 30,951 118,220
2017 57,940 6,831 71,907 104,029
2016 62,086 5,633 122,923 91,568
2015 64,473 4,307 163,248 276,427
2014 66,078 2,921 167,464 308,037
2013 62,618 1,505 166,415 301,926
2012 55,942 351 215,859 281,866
2011 50,711 -505 214,728 269,958
2010 44,914 -6,444 213,083 52,042
2009 48,876 -15,007 197,231 5,308
2008 45,843 -17,277 215,841 -19,630
2007 39,636 -15,220 248,286 -42,293
2006 33,609 -11,934 203,441 -28,434
2005 29,290 -8,924 187,920 -47,821
2004 28,418 -8,148 225,988 -42,549
2003 28,827 -7,986 244,251 -31,994
2002 30,439 -8,934 247,752 -18,105
2001 32,052 -10,244 312,643 -28,006
2000 32,753 -11,241 390,167 -84,960
1999 32,283 -13,481 368,272 -107,448
1998 31,757 -10,315 393,436 -98,044
1997 32,403 -9,132 422,773 -109,130
1996 33,741 -8,626 446,142 -115,705
1995 34,473 -7,346 468,967 -208,491
1994 34,711 -5,449 473,200 -208,309
1993 36,924 -5,429 477,302 -222,802
1992 42,437 -8,404 494,352 -265,849
1991 47,884 -11,427 467,594 -270,754
1990 49,443 -11,881 411,546 79,294
1989 51,420 -9,757 403,266 186,120
1988 51,588 2,459 399,297 192,534
1987 51,140 1,855 378,758 198,057
1986 50,329 354 395,651 189,782
1985 49,944 -1,719 416,219 97,949
1984 48,562 -2,452 436,384 101,394
1983 46,919 -2,522 514,844 102,167
1982 45,179 -2,132 605,626 48,638
1981 43,588 -1,615 631,189 18,442
1980 42,343 -1,268 583,294 -148,341
1979 41,568 -1,296 623,068 -139,566
1978 40,276 1,833 499,084 -85,721
1977 38,995 5,354 578,947 -90,737
1976 37,670 6,577 530,558 -92,314
1975 36,490 6,556 603,300 -52,332
1974 35,297 6,153 673,030 27,005
1973 33,993 5,647 699,115 35,779
1972 32,727 4,999 740,469 25,382
1971 31,536 4,238 789,185 -6,326
1970 30,558 3,263 747,987 -27,999
1969 29,781 2,366 694,227 -21,175
1968 29,017 3,535 684,487 -16,868
1967 28,178 5,139 692,169 -16,484
1966 27,338 5,837 623,534 -16,688
1965 26,364 5,610 641,090 -146,386
1964 25,317 4,599 655,501 -102,284
1963 24,142 3,687 685,824 -80,226
1962 22,960 9,049 712,590 -94,606
1961 21,873 10,440 730,173 -93,179
1960 20,726 10,334 728,010 47,245

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

GeoRank.org/population/mongolia/south-korea | 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 South Korea 4.97% is from natural causes (a loss of 55,818 people) and 95% is from migration (a gain of 1,066,282 people).

As of 2024, 22,589 residents or 0.6% of the population were not native-born in Mongolia, compared to 1,811,507 people or 3.5% in South Korea.

Biggest cities by population

Mongolia
City Population
Ulaanbaatar 1.4M
Bulgan 12.3K
South Korea
City Population
Seoul 9.67M
Busan 3.45M
Incheon 3.05M
Daegu 2.38M
Daejeon 1.48M
Gwangju 1.41M
Suwon 1.23M
Ulsan 1.13M
Yongin 1.08M
Goyang 1.06M

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/south-korea | 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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