The latest officially reported population of Mongolia was 3,568,978 in 2025 vs 19,020,271 people in Romania in 2025. In 2026, based on the adjusted UN estimation, the current Mongolia's population is 3,630,744 people compared to 18,912,567 in Romania.
Population statistics:
- Romania's population is 5.21 times bigger than Mongolia's.
- Mongolia is ranked the 132nd most populous country in the world, while Romania is the 70th.
- The countries together account for 0.27% of the world: 0.04% for Mongolia vs 0.23% for Romania.
- For the last 10 years, Mongolia has had an average growth rate of +1.71% per year vs -0.41% in Romania.
- Since 2006, the population of Mongolia has increased from 2.57M people to 3.63M (41.4% growth), while Romania has declined from 21.2M to 18.9M (10.8% decline).
Mongolia vs Romania: population by year and forecast
| Year | Population | |
|---|---|---|
Mongolia
|
Romania
|
|
| 2100 | 5,630,532 | 10,843,503 |
| 2099 | 5,624,298 | 10,927,951 |
| 2098 | 5,616,442 | 11,011,822 |
| 2097 | 5,607,739 | 11,095,182 |
| 2096 | 5,598,366 | 11,178,195 |
| 2095 | 5,587,141 | 11,261,202 |
| 2094 | 5,575,743 | 11,343,358 |
| 2093 | 5,563,600 | 11,426,736 |
| 2092 | 5,550,506 | 11,509,522 |
| 2091 | 5,537,031 | 11,591,897 |
| 2090 | 5,522,419 | 11,675,686 |
| 2089 | 5,507,083 | 11,759,143 |
| 2088 | 5,491,226 | 11,842,733 |
| 2087 | 5,475,425 | 11,926,699 |
| 2086 | 5,459,661 | 12,013,212 |
| 2085 | 5,442,388 | 12,099,742 |
| 2084 | 5,424,928 | 12,187,794 |
| 2083 | 5,406,747 | 12,277,402 |
| 2082 | 5,388,623 | 12,367,518 |
| 2081 | 5,369,593 | 12,460,785 |
| 2080 | 5,349,817 | 12,556,104 |
| 2079 | 5,329,240 | 12,652,446 |
| 2078 | 5,307,283 | 12,750,395 |
| 2077 | 5,286,383 | 12,849,896 |
| 2076 | 5,264,220 | 12,950,914 |
| 2075 | 5,241,700 | 13,053,551 |
| 2074 | 5,218,897 | 13,158,624 |
| 2073 | 5,195,622 | 13,264,931 |
| 2072 | 5,172,532 | 13,375,162 |
| 2071 | 5,149,066 | 13,488,051 |
| 2070 | 5,124,853 | 13,603,287 |
| 2069 | 5,101,195 | 13,721,187 |
| 2068 | 5,077,035 | 13,840,530 |
| 2067 | 5,052,818 | 13,963,377 |
| 2066 | 5,027,552 | 14,088,938 |
| 2065 | 5,002,655 | 14,218,608 |
| 2064 | 4,978,185 | 14,349,029 |
| 2063 | 4,953,806 | 14,480,312 |
| 2062 | 4,929,364 | 14,613,788 |
| 2061 | 4,904,690 | 14,747,178 |
| 2060 | 4,878,877 | 14,879,235 |
| 2059 | 4,852,963 | 15,011,161 |
| 2058 | 4,826,761 | 15,141,670 |
| 2057 | 4,799,120 | 15,271,230 |
| 2056 | 4,771,151 | 15,400,030 |
| 2055 | 4,742,184 | 15,527,331 |
| 2054 | 4,711,735 | 15,651,338 |
| 2053 | 4,679,745 | 15,773,422 |
| 2052 | 4,646,658 | 15,896,118 |
| 2051 | 4,612,090 | 16,016,719 |
| 2050 | 4,576,701 | 16,135,745 |
| 2049 | 4,539,215 | 16,255,638 |
| 2048 | 4,500,638 | 16,375,139 |
| 2047 | 4,460,511 | 16,494,633 |
| 2046 | 4,419,188 | 16,612,186 |
| 2045 | 4,376,222 | 16,730,009 |
| 2044 | 4,333,010 | 16,848,827 |
| 2043 | 4,289,776 | 16,966,857 |
| 2042 | 4,245,757 | 17,084,359 |
| 2041 | 4,201,838 | 17,203,640 |
| 2040 | 4,158,320 | 17,320,952 |
| 2039 | 4,115,023 | 17,438,042 |
| 2038 | 4,072,646 | 17,556,386 |
| 2037 | 4,030,644 | 17,673,500 |
| 2036 | 3,989,867 | 17,790,613 |
| 2035 | 3,950,239 | 17,906,949 |
| 2034 | 3,911,316 | 18,020,973 |
| 2033 | 3,873,353 | 18,134,889 |
| 2032 | 3,836,311 | 18,247,275 |
| 2031 | 3,800,027 | 18,359,750 |
| 2030 | 3,763,374 | 18,471,446 |
| 2029 | 3,726,490 | 18,583,513 |
| 2028 | 3,688,767 | 18,693,807 |
| 2027 | 3,650,012 | 18,803,518 |
| 2026 | 3,610,395 | 18,912,567 |
| 2025 | 3,568,978 | 19,020,271 |
| 2024 | 3,524,788 | 19,051,804 |
| 2023 | 3,481,145 | 19,061,062 |
| 2022 | 3,433,748 | 19,048,502 |
| 2021 | 3,383,741 | 19,122,059 |
| 2020 | 3,327,204 | 19,265,250 |
| 2019 | 3,267,673 | 19,371,648 |
| 2018 | 3,208,189 | 19,473,970 |
| 2017 | 3,148,917 | 19,588,715 |
| 2016 | 3,088,856 | 19,702,267 |
| 2015 | 3,026,864 | 19,815,616 |
| 2014 | 2,963,113 | 19,908,979 |
| 2013 | 2,899,011 | 19,983,693 |
| 2012 | 2,839,705 | 20,058,035 |
| 2011 | 2,786,317 | 20,147,528 |
| 2010 | 2,738,622 | 20,246,871 |
| 2009 | 2,691,115 | 20,367,487 |
| 2008 | 2,643,201 | 20,537,875 |
| 2007 | 2,601,850 | 20,882,982 |
| 2006 | 2,567,168 | 21,193,760 |
| 2005 | 2,536,407 | 21,319,685 |
| 2004 | 2,508,412 | 21,451,748 |
| 2003 | 2,480,374 | 21,574,326 |
| 2002 | 2,449,027 | 21,730,496 |
| 2001 | 2,417,751 | 22,131,970 |
| 2000 | 2,388,299 | 22,442,971 |
| 1999 | 2,356,813 | 22,472,040 |
| 1998 | 2,323,809 | 22,507,344 |
| 1997 | 2,291,750 | 22,553,978 |
| 1996 | 2,259,507 | 22,619,004 |
| 1995 | 2,224,945 | 22,684,270 |
| 1994 | 2,189,395 | 22,730,211 |
| 1993 | 2,165,130 | 22,763,280 |
| 1992 | 2,167,790 | 22,794,284 |
| 1991 | 2,165,342 | 23,001,155 |
| 1990 | 2,098,710 | 23,201,835 |
| 1989 | 2,124,185 | 23,161,458 |
| 1988 | 2,076,322 | 23,057,662 |
| 1987 | 2,022,800 | 22,949,430 |
| 1986 | 1,970,965 | 22,836,841 |
| 1985 | 1,921,514 | 22,732,999 |
| 1984 | 1,874,349 | 22,640,547 |
| 1983 | 1,829,092 | 22,560,478 |
| 1982 | 1,785,364 | 22,475,741 |
| 1981 | 1,742,857 | 22,353,070 |
| 1980 | 1,701,335 | 22,207,282 |
| 1979 | 1,660,659 | 22,090,488 |
| 1978 | 1,619,468 | 21,951,464 |
| 1977 | 1,576,245 | 21,756,096 |
| 1976 | 1,531,945 | 21,551,634 |
| 1975 | 1,488,296 | 21,293,583 |
| 1974 | 1,446,050 | 21,029,429 |
| 1973 | 1,405,502 | 20,835,681 |
| 1972 | 1,366,821 | 20,657,957 |
| 1971 | 1,330,071 | 20,461,567 |
| 1970 | 1,295,272 | 20,250,398 |
| 1969 | 1,262,284 | 20,009,141 |
| 1968 | 1,229,930 | 19,799,831 |
| 1967 | 1,196,996 | 19,534,242 |
| 1966 | 1,163,754 | 19,215,450 |
| 1965 | 1,131,177 | 19,031,576 |
| 1964 | 1,100,234 | 18,919,126 |
| 1963 | 1,071,362 | 18,797,850 |
| 1962 | 1,041,444 | 18,676,550 |
| 1961 | 1,009,284 | 18,555,250 |
| 1960 | 977,595 | 18,406,905 |
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/romania | CC BY 
From 2006 to 2016, the population of Mongolia increased by 521,688 people (a 20.3% growth), while Romania lost 1,491,493 people (a 7.04% decline).
For the next 10 years, from 2016 to 2026, Mongolia gained 541,888 people (a 17.5% growth), while Romania's population decreased by 789,700 people (a 4.01% decline).
Mongolia was ranked 137th most populous country in 2006 and is 132nd in 2026. Romania was ranked 51st in 2006 and ranked 70th 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 Romania will decrease by 14.7% to 16,135,745 people and rank change from 70th to 81st.
Mongolia is projected to reach its peak in 2100 at 5.63M people, while Romania's population already peaked in 1990 at 23.2M people and is projected to decrease to 10.8M people by 2100.
Population growth rate by year
| Year | Growth rate | |
|---|---|---|
|
Mongolia
|
Romania
|
|
| 2100 | 0.11% | -0.77% |
| 2099 | 0.14% | -0.76% |
| 2098 | 0.16% | -0.75% |
| 2097 | 0.17% | -0.74% |
| 2096 | 0.2% | -0.74% |
| 2095 | 0.2% | -0.72% |
| 2094 | 0.22% | -0.73% |
| 2093 | 0.24% | -0.72% |
| 2092 | 0.24% | -0.71% |
| 2091 | 0.26% | -0.72% |
| 2090 | 0.28% | -0.71% |
| 2089 | 0.29% | -0.71% |
| 2088 | 0.29% | -0.7% |
| 2087 | 0.29% | -0.72% |
| 2086 | 0.32% | -0.72% |
| 2085 | 0.32% | -0.72% |
| 2084 | 0.34% | -0.73% |
| 2083 | 0.34% | -0.73% |
| 2082 | 0.35% | -0.75% |
| 2081 | 0.37% | -0.76% |
| 2080 | 0.39% | -0.76% |
| 2079 | 0.41% | -0.77% |
| 2078 | 0.4% | -0.77% |
| 2077 | 0.42% | -0.78% |
| 2076 | 0.43% | -0.79% |
| 2075 | 0.44% | -0.8% |
| 2074 | 0.45% | -0.8% |
| 2073 | 0.45% | -0.82% |
| 2072 | 0.46% | -0.84% |
| 2071 | 0.47% | -0.85% |
| 2070 | 0.46% | -0.86% |
| 2069 | 0.48% | -0.86% |
| 2068 | 0.48% | -0.88% |
| 2067 | 0.5% | -0.89% |
| 2066 | 0.5% | -0.91% |
| 2065 | 0.49% | -0.91% |
| 2064 | 0.49% | -0.91% |
| 2063 | 0.5% | -0.91% |
| 2062 | 0.5% | -0.9% |
| 2061 | 0.53% | -0.89% |
| 2060 | 0.53% | -0.88% |
| 2059 | 0.54% | -0.86% |
| 2058 | 0.58% | -0.85% |
| 2057 | 0.59% | -0.84% |
| 2056 | 0.61% | -0.82% |
| 2055 | 0.65% | -0.79% |
| 2054 | 0.68% | -0.77% |
| 2053 | 0.71% | -0.77% |
| 2052 | 0.75% | -0.75% |
| 2051 | 0.77% | -0.74% |
| 2050 | 0.83% | -0.74% |
| 2049 | 0.86% | -0.73% |
| 2048 | 0.9% | -0.72% |
| 2047 | 0.94% | -0.71% |
| 2046 | 0.98% | -0.7% |
| 2045 | 1% | -0.71% |
| 2044 | 1.01% | -0.7% |
| 2043 | 1.04% | -0.69% |
| 2042 | 1.05% | -0.69% |
| 2041 | 1.05% | -0.68% |
| 2040 | 1.05% | -0.67% |
| 2039 | 1.04% | -0.67% |
| 2038 | 1.04% | -0.66% |
| 2037 | 1.02% | -0.66% |
| 2036 | 1% | -0.65% |
| 2035 | 1% | -0.63% |
| 2034 | 0.98% | -0.63% |
| 2033 | 0.97% | -0.62% |
| 2032 | 0.95% | -0.61% |
| 2031 | 0.97% | -0.6% |
| 2030 | 0.99% | -0.6% |
| 2029 | 1.02% | -0.59% |
| 2028 | 1.06% | -0.58% |
| 2027 | 1.1% | -0.58% |
| 2026 | 1.16% | -0.57% |
| 2025 | 1.25% | -0.17% |
| 2024 | 1.25% | -0.05% |
| 2023 | 1.38% | 0.07% |
| 2022 | 1.48% | -0.38% |
| 2021 | 1.7% | -0.74% |
| 2020 | 1.82% | -0.55% |
| 2019 | 1.85% | -0.53% |
| 2018 | 1.88% | -0.59% |
| 2017 | 1.94% | -0.58% |
| 2016 | 2.05% | -0.57% |
| 2015 | 2.15% | -0.47% |
| 2014 | 2.21% | -0.37% |
| 2013 | 2.09% | -0.37% |
| 2012 | 1.92% | -0.44% |
| 2011 | 1.74% | -0.49% |
| 2010 | 1.77% | -0.59% |
| 2009 | 1.81% | -0.83% |
| 2008 | 1.59% | -1.65% |
| 2007 | 1.35% | -1.47% |
| 2006 | 1.21% | -0.59% |
| 2005 | 1.12% | -0.62% |
| 2004 | 1.13% | -0.57% |
| 2003 | 1.28% | -0.72% |
| 2002 | 1.29% | -1.81% |
| 2001 | 1.23% | -1.39% |
| 2000 | 1.34% | -0.13% |
| 1999 | 1.42% | -0.16% |
| 1998 | 1.4% | -0.21% |
| 1997 | 1.43% | -0.29% |
| 1996 | 1.55% | -0.29% |
| 1995 | 1.62% | -0.2% |
| 1994 | 1.12% | -0.15% |
| 1993 | -0.12% | -0.14% |
| 1992 | 0.11% | -0.9% |
| 1991 | 3.17% | -0.86% |
| 1990 | -1.2% | 0.17% |
| 1989 | 2.31% | 0.45% |
| 1988 | 2.65% | 0.47% |
| 1987 | 2.63% | 0.49% |
| 1986 | 2.57% | 0.46% |
| 1985 | 2.52% | 0.41% |
| 1984 | 2.47% | 0.35% |
| 1983 | 2.45% | 0.38% |
| 1982 | 2.44% | 0.55% |
| 1981 | 2.44% | 0.66% |
| 1980 | 2.45% | 0.53% |
| 1979 | 2.54% | 0.63% |
| 1978 | 2.74% | 0.9% |
| 1977 | 2.89% | 0.95% |
| 1976 | 2.93% | 1.21% |
| 1975 | 2.92% | 1.26% |
| 1974 | 2.88% | 0.93% |
| 1973 | 2.83% | 0.86% |
| 1972 | 2.76% | 0.96% |
| 1971 | 2.69% | 1.04% |
| 1970 | 2.61% | 1.21% |
| 1969 | 2.63% | 1.06% |
| 1968 | 2.75% | 1.36% |
| 1967 | 2.86% | 1.66% |
| 1966 | 2.88% | 0.97% |
| 1965 | 2.81% | 0.59% |
| 1964 | 2.69% | 0.65% |
| 1963 | 2.87% | 0.65% |
| 1962 | 3.19% | 0.65% |
| 1961 | 3.24% | 0.81% |
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/romania | CC BY
In 2025, the population of Mongolia grew by 1.25%, while Romania's population declined by 0.17%.
Live population counters
|
Mongolia
|
Romania
|
|
|---|---|---|
| Current population |
3630744
|
18912567
|
| Population rank | 132/197 | 70/197 |
| Percent of world population | 0.04% | 0.23% |
| One net population change |
11.9 minutes
|
16.7 minutes
|
| One birth every |
8.82 minutes
|
3.68 minutes
|
| One death every |
27.1 minutes
|
2.16 minutes
|
| Daily growth/decline | +121 | -86 |
| Annual growth/decline | +44,190 | -31,533 |
| Annual growth/decline rate | +1.25% | -0.17% |
| Population growth rate rank | 81/197 | 172/197 |
| One migration net change every |
4.63 days
|
18.1 minutes
|
| Annual migration change | +79 | -29,041 |
| Net migration rank | 74/196 | 163/196 |
| Foreign-born residents | 22,589 | 655,579 |
| Foreign-born residents rank | 169/195 | 73/195 |
| Foreign-born share of population | 0.6% | 3.4% |
| Foreign-born share rank | 171/195 | 112/195 |
Natural population change vs migration
| Year | Population change | |||
|---|---|---|---|---|
|
Mongolia
|
Romania
|
|||
| Natural | Migration | Natural | Migration | |
| 2025 | - | 79 | - | -29,041 |
| 2024 | 40,182 | 83 | -100,975 | -28,466 |
| 2023 | 46,995 | 0 | -83,869 | -27,780 |
| 2022 | 47,730 | 0 | -93,338 | 89,076 |
| 2021 | 52,109 | 0 | -141,504 | -17,731 |
| 2020 | 60,888 | 0 | -100,179 | -13,202 |
| 2019 | 61,433 | 8,660 | -60,053 | -27,909 |
| 2018 | 60,635 | 7,811 | -62,316 | -33,018 |
| 2017 | 57,940 | 6,831 | -50,930 | -33,081 |
| 2016 | 62,086 | 5,633 | -53,196 | -33,073 |
| 2015 | 64,473 | 4,307 | -59,447 | -35,751 |
| 2014 | 66,078 | 2,921 | -55,745 | -35,448 |
| 2013 | 62,618 | 1,505 | -59,951 | -34,910 |
| 2012 | 55,942 | 351 | -54,157 | -37,589 |
| 2011 | 50,711 | -505 | -56,413 | -102,769 |
| 2010 | 44,914 | -6,444 | -46,567 | -122,364 |
| 2009 | 48,876 | -15,007 | -34,625 | -137,953 |
| 2008 | 45,843 | -17,277 | -30,806 | -144,368 |
| 2007 | 39,636 | -15,220 | -37,590 | -133,089 |
| 2006 | 33,609 | -11,934 | -38,148 | -132,777 |
| 2005 | 29,290 | -8,924 | -40,508 | -131,176 |
| 2004 | 28,418 | -8,148 | -42,904 | -117,432 |
| 2003 | 28,827 | -7,986 | -56,093 | -107,139 |
| 2002 | 30,439 | -8,934 | -58,673 | -106,585 |
| 2001 | 32,052 | -10,244 | -37,625 | -91,154 |
| 2000 | 32,753 | -11,241 | -22,443 | -92,451 |
| 1999 | 32,283 | -13,481 | -31,461 | -82,590 |
| 1998 | 31,757 | -10,315 | -33,761 | -81,366 |
| 1997 | 32,403 | -9,132 | -42,853 | -88,734 |
| 1996 | 33,741 | -8,626 | -56,548 | -70,799 |
| 1995 | 34,473 | -7,346 | -36,295 | -73,779 |
| 1994 | 34,711 | -5,449 | -18,184 | -76,246 |
| 1993 | 36,924 | -5,429 | -13,658 | -73,475 |
| 1992 | 42,437 | -8,404 | -4,559 | -63,200 |
| 1991 | 47,884 | -11,427 | 25,301 | -36,824 |
| 1990 | 49,443 | -11,881 | 69,605 | -38,157 |
| 1989 | 51,420 | -9,757 | 122,756 | -33,866 |
| 1988 | 51,588 | 2,459 | 126,817 | -48,911 |
| 1987 | 51,140 | 1,855 | 128,517 | -42,868 |
| 1986 | 50,329 | 354 | 134,737 | -50,450 |
| 1985 | 49,944 | -1,719 | 111,392 | -28,108 |
| 1984 | 48,562 | -2,452 | 117,731 | -24,629 |
| 1983 | 46,919 | -2,522 | 87,986 | 3,093 |
| 1982 | 45,179 | -2,132 | 119,121 | -4,725 |
| 1981 | 43,588 | -1,615 | 156,472 | -20,870 |
| 1980 | 42,343 | -1,268 | 168,776 | -16,668 |
| 1979 | 41,568 | -1,296 | 194,397 | -29,600 |
| 1978 | 40,276 | 1,833 | 204,148 | -31,427 |
| 1977 | 38,995 | 5,354 | 215,385 | -28,135 |
| 1976 | 37,670 | 6,577 | 213,361 | 18,748 |
| 1975 | 36,490 | 6,556 | 219,324 | 9,125 |
| 1974 | 35,297 | 6,153 | 235,530 | 6,725 |
| 1973 | 33,993 | 5,647 | 175,020 | 58,651 |
| 1972 | 32,727 | 4,999 | 198,316 | 61,920 |
| 1971 | 31,536 | 4,238 | 206,662 | 74,473 |
| 1970 | 30,558 | 3,263 | 234,905 | 71,919 |
| 1969 | 29,781 | 2,366 | 264,120 | 74,851 |
| 1968 | 29,017 | 3,535 | 338,577 | 33,601 |
| 1967 | 28,178 | 5,139 | 347,709 | 37,282 |
| 1966 | 27,338 | 5,837 | 115,293 | -25,458 |
| 1965 | 26,364 | 5,610 | 114,190 | -60,430 |
| 1964 | 25,317 | 4,599 | 134,326 | -59,500 |
| 1963 | 24,142 | 3,687 | 139,104 | -58,076 |
| 1962 | 22,960 | 9,049 | 130,736 | -56,152 |
| 1961 | 21,873 | 10,440 | 163,286 | -54,642 |
| 1960 | 20,726 | 10,334 | 191,431 | -55,397 |
Data sources: World Bank | Health (1960–2025, retrieved 2026-07-08).
GeoRank.org/population/mongolia/romania | 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 Romania 83.4% is from natural causes (a loss of 805,807 people) and 16.6% is from migration (a loss of 160,935 people).
As of 2024, 22,589 residents or 0.6% of the population were not native-born in Mongolia, compared to 655,579 people or 3.4% in Romania.
Biggest cities by population
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Population differences between Mongolia and Romania
|
Mongolia
|
Romania
|
|
|---|---|---|
| Life expectancy | 72.5 years | 76.4 years |
| Average age | 29.9 years | 42.6 years |
| Median age | 27.9 years | 44.1 years |
| Male:Female ratio | 49.8:50.2 | 48.4:51.6 |
| Fertility rate | 2.5 births per woman | 1.39 births per woman |
| Population density | 6 ppl/mi² | 212.9 ppl/mi² |
Population map with other countries
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/romania | CC BY
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Data sources:
- World Bank | Health (1960–2025, retrieved 2026-07-08)
- United Nations | World Population Prospects (1960–2100, retrieved 2026-07-08)
- U.S. Census Bureau (1960–2025, retrieved 2026-07-08)
- Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-07-08)
- Wikidata (2026, retrieved 2026-07-08)
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