The latest officially reported population of Bulgaria was 6,433,302 in 2025 vs 12,025 people in Nauru in 2025. In 2026, based on the adjusted UN estimation, the current Bulgaria's population is 6,390,149 people compared to 12,139 in Nauru.
Population statistics:
- Bulgaria's population is 526 times bigger than Nauru's.
- Bulgaria is ranked the 112th most populous country in the world, while Nauru is the 195th.
- The countries together account for 0.08% of the world: 0.08% for Bulgaria vs 0.0001% for Nauru.
- For the last 10 years, Bulgaria has had an average growth rate of -0.86% per year vs +1.03% in Nauru.
- Since 2006, the population of Bulgaria has decreased from 7.6M people to 6.39M (15.9% decline), while Nauru has grown from 10K to 12.1K (21% growth).
Bulgaria vs Nauru: population by year and forecast
| Year | Population | |
|---|---|---|
Bulgaria
|
Nauru
|
|
| 2100 | 3,384,288 | 20,708 |
| 2099 | 3,408,821 | 20,677 |
| 2098 | 3,433,149 | 20,636 |
| 2097 | 3,457,549 | 20,596 |
| 2096 | 3,482,057 | 20,561 |
| 2095 | 3,506,060 | 20,526 |
| 2094 | 3,530,278 | 20,479 |
| 2093 | 3,554,432 | 20,423 |
| 2092 | 3,578,667 | 20,377 |
| 2091 | 3,602,907 | 20,332 |
| 2090 | 3,627,300 | 20,276 |
| 2089 | 3,652,188 | 20,210 |
| 2088 | 3,677,416 | 20,143 |
| 2087 | 3,703,460 | 20,087 |
| 2086 | 3,730,284 | 20,019 |
| 2085 | 3,757,953 | 19,950 |
| 2084 | 3,786,496 | 19,872 |
| 2083 | 3,815,548 | 19,787 |
| 2082 | 3,845,662 | 19,700 |
| 2081 | 3,876,344 | 19,603 |
| 2080 | 3,908,874 | 19,517 |
| 2079 | 3,942,344 | 19,411 |
| 2078 | 3,976,345 | 19,304 |
| 2077 | 4,011,440 | 19,198 |
| 2076 | 4,047,182 | 19,089 |
| 2075 | 4,083,977 | 18,978 |
| 2074 | 4,122,447 | 18,866 |
| 2073 | 4,161,511 | 18,750 |
| 2072 | 4,201,158 | 18,630 |
| 2071 | 4,241,639 | 18,527 |
| 2070 | 4,283,145 | 18,388 |
| 2069 | 4,325,083 | 18,281 |
| 2068 | 4,367,606 | 18,160 |
| 2067 | 4,411,116 | 18,017 |
| 2066 | 4,455,358 | 17,896 |
| 2065 | 4,500,141 | 17,769 |
| 2064 | 4,545,243 | 17,641 |
| 2063 | 4,590,439 | 17,516 |
| 2062 | 4,635,634 | 17,394 |
| 2061 | 4,681,315 | 17,260 |
| 2060 | 4,727,089 | 17,129 |
| 2059 | 4,772,667 | 17,006 |
| 2058 | 4,817,532 | 16,874 |
| 2057 | 4,862,597 | 16,745 |
| 2056 | 4,907,646 | 16,605 |
| 2055 | 4,953,105 | 16,465 |
| 2054 | 4,998,650 | 16,328 |
| 2053 | 5,044,397 | 16,186 |
| 2052 | 5,089,817 | 16,042 |
| 2051 | 5,135,505 | 15,881 |
| 2050 | 5,181,635 | 15,731 |
| 2049 | 5,228,058 | 15,565 |
| 2048 | 5,274,692 | 15,405 |
| 2047 | 5,322,212 | 15,234 |
| 2046 | 5,369,645 | 15,058 |
| 2045 | 5,417,381 | 14,888 |
| 2044 | 5,465,818 | 14,712 |
| 2043 | 5,514,902 | 14,539 |
| 2042 | 5,564,573 | 14,357 |
| 2041 | 5,615,489 | 14,174 |
| 2040 | 5,667,076 | 13,990 |
| 2039 | 5,719,506 | 13,821 |
| 2038 | 5,771,452 | 13,666 |
| 2037 | 5,824,628 | 13,507 |
| 2036 | 5,877,980 | 13,358 |
| 2035 | 5,930,517 | 13,190 |
| 2034 | 5,983,205 | 13,035 |
| 2033 | 6,036,049 | 12,888 |
| 2032 | 6,088,107 | 12,753 |
| 2031 | 6,140,619 | 12,619 |
| 2030 | 6,193,318 | 12,499 |
| 2029 | 6,244,785 | 12,381 |
| 2028 | 6,294,981 | 12,286 |
| 2027 | 6,343,732 | 12,177 |
| 2026 | 6,390,149 | 12,100 |
| 2025 | 6,433,302 | 12,025 |
| 2024 | 6,441,421 | 11,947 |
| 2023 | 6,446,596 | 11,875 |
| 2022 | 6,465,097 | 11,801 |
| 2021 | 6,507,301 | 11,709 |
| 2020 | 6,550,696 | 11,643 |
| 2019 | 6,616,726 | 11,587 |
| 2018 | 6,710,798 | 11,477 |
| 2017 | 6,803,468 | 11,324 |
| 2016 | 6,894,139 | 11,150 |
| 2015 | 6,984,225 | 10,954 |
| 2014 | 7,073,572 | 10,742 |
| 2013 | 7,160,005 | 10,517 |
| 2012 | 7,305,888 | 10,267 |
| 2011 | 7,348,328 | 10,098 |
| 2010 | 7,395,599 | 10,043 |
| 2009 | 7,444,443 | 10,016 |
| 2008 | 7,492,561 | 10,009 |
| 2007 | 7,545,338 | 10,020 |
| 2006 | 7,601,022 | 10,034 |
| 2005 | 7,658,972 | 10,049 |
| 2004 | 7,716,860 | 10,060 |
| 2003 | 7,775,327 | 10,059 |
| 2002 | 7,837,161 | 10,082 |
| 2001 | 8,009,142 | 10,130 |
| 2000 | 8,170,172 | 10,168 |
| 1999 | 8,210,624 | 10,187 |
| 1998 | 8,256,786 | 10,198 |
| 1997 | 8,312,068 | 10,197 |
| 1996 | 8,362,826 | 10,183 |
| 1995 | 8,406,067 | 10,165 |
| 1994 | 8,443,591 | 10,137 |
| 1993 | 8,472,313 | 10,102 |
| 1992 | 8,540,164 | 10,021 |
| 1991 | 8,632,367 | 9,850 |
| 1990 | 8,718,289 | 9,622 |
| 1989 | 8,876,972 | 9,390 |
| 1988 | 8,981,446 | 9,165 |
| 1987 | 8,971,359 | 8,946 |
| 1986 | 8,958,171 | 8,742 |
| 1985 | 8,960,547 | 8,551 |
| 1984 | 8,960,679 | 8,377 |
| 1983 | 8,939,738 | 8,216 |
| 1982 | 8,917,457 | 8,040 |
| 1981 | 8,891,117 | 7,839 |
| 1980 | 8,861,535 | 7,649 |
| 1979 | 8,825,940 | 7,468 |
| 1978 | 8,814,032 | 7,298 |
| 1977 | 8,804,183 | 7,163 |
| 1976 | 8,758,599 | 7,064 |
| 1975 | 8,720,742 | 6,987 |
| 1974 | 8,678,745 | 6,923 |
| 1973 | 8,620,967 | 6,866 |
| 1972 | 8,576,200 | 6,812 |
| 1971 | 8,536,395 | 6,762 |
| 1970 | 8,489,574 | 6,710 |
| 1969 | 8,434,172 | 6,581 |
| 1968 | 8,369,603 | 6,328 |
| 1967 | 8,310,226 | 6,135 |
| 1966 | 8,258,057 | 6,043 |
| 1965 | 8,204,168 | 5,832 |
| 1964 | 8,144,340 | 5,515 |
| 1963 | 8,078,145 | 5,226 |
| 1962 | 8,012,946 | 4,979 |
| 1961 | 7,943,118 | 4,774 |
| 1960 | 7,867,374 | 4,607 |
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/bulgaria/nauru | CC BY 
From 2006 to 2016, the population of Bulgaria decreased by 706,883 people (a 9.3% decline), while Nauru gained 1,116 people (a 11.1% growth).
For the next 10 years, from 2016 to 2026, Bulgaria lost 503,990 people (a 7.31% decline), while Nauru's population increased by 989 people (a 8.87% growth).
Bulgaria was ranked 95th most populous country in 2006 and is 112th in 2026. Nauru was ranked 196th in 2006 and ranked 195th now.
The UN's World Population Prospects forecasts that in 24 years (in 2050) Bulgaria's population will shrink by 18.9% to 5,181,635 people with a rank change from 112th to 128th. The population of Nauru will increase by 29.6% to 15,731 people and rank change from 195th to 194th.
Nauru is projected to reach its peak in 2100 at 20.7K people, while Bulgaria's population already peaked in 1988 at 8.98M people and is projected to decrease to 3.38M people by 2100.
Population growth rate by year
| Year | Growth rate | |
|---|---|---|
|
Bulgaria
|
Nauru
|
|
| 2100 | -0.72% | 0.15% |
| 2099 | -0.71% | 0.2% |
| 2098 | -0.71% | 0.19% |
| 2097 | -0.7% | 0.17% |
| 2096 | -0.68% | 0.17% |
| 2095 | -0.69% | 0.23% |
| 2094 | -0.68% | 0.27% |
| 2093 | -0.68% | 0.23% |
| 2092 | -0.67% | 0.22% |
| 2091 | -0.67% | 0.28% |
| 2090 | -0.68% | 0.33% |
| 2089 | -0.69% | 0.33% |
| 2088 | -0.7% | 0.28% |
| 2087 | -0.72% | 0.34% |
| 2086 | -0.74% | 0.35% |
| 2085 | -0.75% | 0.39% |
| 2084 | -0.76% | 0.43% |
| 2083 | -0.78% | 0.44% |
| 2082 | -0.79% | 0.5% |
| 2081 | -0.83% | 0.44% |
| 2080 | -0.85% | 0.54% |
| 2079 | -0.86% | 0.56% |
| 2078 | -0.87% | 0.55% |
| 2077 | -0.88% | 0.57% |
| 2076 | -0.9% | 0.59% |
| 2075 | -0.93% | 0.6% |
| 2074 | -0.94% | 0.62% |
| 2073 | -0.94% | 0.65% |
| 2072 | -0.95% | 0.56% |
| 2071 | -0.97% | 0.75% |
| 2070 | -0.97% | 0.59% |
| 2069 | -0.97% | 0.66% |
| 2068 | -0.99% | 0.8% |
| 2067 | -0.99% | 0.68% |
| 2066 | -1% | 0.71% |
| 2065 | -0.99% | 0.73% |
| 2064 | -0.98% | 0.71% |
| 2063 | -0.97% | 0.7% |
| 2062 | -0.98% | 0.78% |
| 2061 | -0.97% | 0.76% |
| 2060 | -0.95% | 0.73% |
| 2059 | -0.93% | 0.78% |
| 2058 | -0.93% | 0.77% |
| 2057 | -0.92% | 0.85% |
| 2056 | -0.92% | 0.85% |
| 2055 | -0.91% | 0.84% |
| 2054 | -0.91% | 0.87% |
| 2053 | -0.89% | 0.9% |
| 2052 | -0.89% | 1.01% |
| 2051 | -0.89% | 0.96% |
| 2050 | -0.89% | 1.06% |
| 2049 | -0.88% | 1.04% |
| 2048 | -0.89% | 1.12% |
| 2047 | -0.88% | 1.17% |
| 2046 | -0.88% | 1.14% |
| 2045 | -0.89% | 1.2% |
| 2044 | -0.89% | 1.19% |
| 2043 | -0.89% | 1.27% |
| 2042 | -0.91% | 1.29% |
| 2041 | -0.91% | 1.32% |
| 2040 | -0.92% | 1.22% |
| 2039 | -0.9% | 1.14% |
| 2038 | -0.91% | 1.17% |
| 2037 | -0.91% | 1.12% |
| 2036 | -0.89% | 1.27% |
| 2035 | -0.88% | 1.19% |
| 2034 | -0.88% | 1.14% |
| 2033 | -0.86% | 1.06% |
| 2032 | -0.86% | 1.06% |
| 2031 | -0.85% | 0.96% |
| 2030 | -0.82% | 0.96% |
| 2029 | -0.8% | 0.77% |
| 2028 | -0.77% | 0.9% |
| 2027 | -0.73% | 0.64% |
| 2026 | -0.67% | 0.63% |
| 2025 | -0.13% | 0.65% |
| 2024 | -0.08% | 0.61% |
| 2023 | -0.29% | 0.63% |
| 2022 | -0.65% | 0.79% |
| 2021 | -0.66% | 0.57% |
| 2020 | -1% | 0.48% |
| 2019 | -1.4% | 0.96% |
| 2018 | -1.36% | 1.35% |
| 2017 | -1.32% | 1.56% |
| 2016 | -1.29% | 1.79% |
| 2015 | -1.26% | 1.97% |
| 2014 | -1.21% | 2.14% |
| 2013 | -2% | 2.43% |
| 2012 | -0.58% | 1.67% |
| 2011 | -0.64% | 0.55% |
| 2010 | -0.66% | 0.27% |
| 2009 | -0.64% | 0.07% |
| 2008 | -0.7% | -0.11% |
| 2007 | -0.73% | -0.14% |
| 2006 | -0.76% | -0.15% |
| 2005 | -0.75% | -0.11% |
| 2004 | -0.75% | 0.01% |
| 2003 | -0.79% | -0.23% |
| 2002 | -2.15% | -0.47% |
| 2001 | -1.97% | -0.37% |
| 2000 | -0.49% | -0.19% |
| 1999 | -0.56% | -0.11% |
| 1998 | -0.67% | 0.01% |
| 1997 | -0.61% | 0.14% |
| 1996 | -0.51% | 0.18% |
| 1995 | -0.44% | 0.28% |
| 1994 | -0.34% | 0.35% |
| 1993 | -0.79% | 0.81% |
| 1992 | -1.07% | 1.74% |
| 1991 | -0.99% | 2.37% |
| 1990 | -1.79% | 2.47% |
| 1989 | -1.16% | 2.45% |
| 1988 | 0.11% | 2.45% |
| 1987 | 0.15% | 2.33% |
| 1986 | -0.03% | 2.23% |
| 1985 | -0.001% | 2.08% |
| 1984 | 0.23% | 1.96% |
| 1983 | 0.25% | 2.19% |
| 1982 | 0.3% | 2.56% |
| 1981 | 0.33% | 2.48% |
| 1980 | 0.4% | 2.42% |
| 1979 | 0.14% | 2.33% |
| 1978 | 0.11% | 1.88% |
| 1977 | 0.52% | 1.4% |
| 1976 | 0.43% | 1.1% |
| 1975 | 0.48% | 0.92% |
| 1974 | 0.67% | 0.83% |
| 1973 | 0.52% | 0.79% |
| 1972 | 0.47% | 0.74% |
| 1971 | 0.55% | 0.77% |
| 1970 | 0.66% | 1.96% |
| 1969 | 0.77% | 4% |
| 1968 | 0.71% | 3.15% |
| 1967 | 0.63% | 1.52% |
| 1966 | 0.66% | 3.62% |
| 1965 | 0.73% | 5.75% |
| 1964 | 0.82% | 5.53% |
| 1963 | 0.81% | 4.96% |
| 1962 | 0.88% | 4.29% |
| 1961 | 0.96% | 3.62% |
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/bulgaria/nauru | CC BY
In 2025, the population of Bulgaria declined by 0.13%, while Nauru's population grew by 0.65%.
Live population counters
|
Bulgaria
|
Nauru
|
|
|---|---|---|
| Current population |
6390149
|
12139
|
| Population rank | 112/197 | 195/197 |
| Percent of world population | 0.08% | 0.0001% |
| One net population change |
1.08 hours
|
4.69 days
|
| One birth every |
9.83 minutes
|
1.25 days
|
| One death every |
5.23 minutes
|
4.06 days
|
| Daily growth/decline | -22 | +0 |
| Annual growth/decline | -8,119 | +78 |
| Annual growth/decline rate | -0.13% | +0.65% |
| Population growth rate rank | 168/197 | 119/197 |
| One migration net change every |
2.97 hours
|
3 days
|
| Annual migration change | -2,961 | -122 |
| Net migration rank | 106/196 | 82/196 |
| Foreign-born residents | 299,100 | 2,548 |
| Foreign-born residents rank | 98/195 | 191/195 |
| Foreign-born share of population | 4.4% | 21.3% |
| Foreign-born share rank | 99/195 | 29/195 |
Natural population change vs migration
| Year | Population change | |||
|---|---|---|---|---|
|
Bulgaria
|
Nauru
|
|||
| Natural | Migration | Natural | Migration | |
| 2025 | - | -2,961 | - | -122 |
| 2024 | -47,023 | 524 | 203 | -121 |
| 2023 | -43,837 | 5,173 | 213 | -148 |
| 2022 | -62,065 | 26,498 | 226 | -144 |
| 2021 | -90,452 | 11,756 | 236 | -137 |
| 2020 | -65,507 | 30,167 | 246 | -214 |
| 2019 | -46,317 | -2,156 | 255 | -171 |
| 2018 | -46,304 | -3,873 | 265 | -131 |
| 2017 | -45,583 | -6,109 | 279 | -115 |
| 2016 | -42,744 | -9,482 | 289 | -105 |
| 2015 | -44,699 | -4,227 | 291 | -86 |
| 2014 | -41,027 | -2,180 | 290 | -69 |
| 2013 | -37,948 | -1,324 | 291 | -53 |
| 2012 | -40,183 | -26,334 | 292 | -38 |
| 2011 | -37,477 | -23,360 | 291 | -206 |
| 2010 | -34,759 | -21,668 | 281 | -246 |
| 2009 | -26,800 | -19,060 | 261 | -249 |
| 2008 | -32,967 | -17,595 | 240 | -243 |
| 2007 | -37,727 | -16,366 | 222 | -235 |
| 2006 | -39,526 | -15,184 | 209 | -224 |
| 2005 | -42,124 | -14,435 | 204 | -217 |
| 2004 | -40,128 | -13,604 | 202 | -210 |
| 2003 | -44,319 | -13,183 | 201 | -199 |
| 2002 | -46,240 | -12,735 | 200 | -247 |
| 2001 | -44,050 | -30,726 | 203 | -252 |
| 2000 | -41,668 | -26,211 | 207 | -236 |
| 1999 | -39,411 | -23,846 | 212 | -227 |
| 1998 | -52,844 | -23,262 | 214 | -217 |
| 1997 | -58,185 | -22,963 | 218 | -209 |
| 1996 | -45,159 | -21,520 | 221 | -204 |
| 1995 | -42,030 | -22,020 | 225 | -201 |
| 1994 | -32,086 | -20,984 | 229 | -196 |
| 1993 | -24,569 | -19,973 | 235 | -194 |
| 1992 | -18,789 | -120,552 | 237 | -121 |
| 1991 | -14,675 | -119,356 | 225 | 0 |
| 1990 | -3,487 | -116,817 | 214 | 20 |
| 1989 | 5,326 | -114,705 | 204 | 24 |
| 1988 | 9,879 | 215 | 195 | 29 |
| 1987 | 8,971 | 357 | 186 | 27 |
| 1986 | 16,125 | 1,104 | 178 | 21 |
| 1985 | 11,649 | -19,230 | 171 | 8 |
| 1984 | 20,610 | -1,032 | 166 | -2 |
| 1983 | 21,455 | -1,872 | 163 | -5 |
| 1982 | 24,077 | -1,860 | 162 | 30 |
| 1981 | 29,341 | -1,830 | 157 | 44 |
| 1980 | 30,129 | -2,045 | 145 | 44 |
| 1979 | 40,599 | -872 | 130 | 48 |
| 1978 | 44,070 | -62,769 | 111 | 40 |
| 1977 | 47,543 | -11,955 | 89 | 32 |
| 1976 | 56,055 | -2,522 | 79 | 0 |
| 1975 | 54,941 | -38,071 | 70 | 0 |
| 1974 | 64,223 | -1,402 | 63 | 0 |
| 1973 | 57,760 | -5,409 | 57 | 0 |
| 1972 | 47,169 | -11,296 | 53 | 0 |
| 1971 | 52,925 | -7,654 | 50 | 0 |
| 1970 | 61,125 | -11,315 | 49 | 0 |
| 1969 | 63,256 | -3,204 | 71 | 132 |
| 1968 | 69,468 | -132 | 116 | 180 |
| 1967 | 49,861 | -420 | 117 | -28 |
| 1966 | 54,504 | -144 | 123 | -32 |
| 1965 | 58,249 | -1,406 | 113 | 218 |
| 1964 | 66,783 | 505 | 100 | 203 |
| 1963 | 66,241 | 500 | 88 | 181 |
| 1962 | 64,104 | 499 | 75 | 158 |
| 1961 | 75,460 | 378 | 70 | 120 |
| 1960 | 76,314 | -1,112 | 72 | 76 |
Data sources: World Bank | Health (1960–2025, retrieved 2026-07-08).
GeoRank.org/population/bulgaria/nauru | CC BY
Over the last 10 years, 91.7% of the population change in Bulgaria is from natural causes (a loss of 534,531 people) and 8.28% is from migration (a gain of 48,271 people). In Nauru 64.6% is from natural causes (a gain of 2,503 people) and 35.4% is from migration (a loss of 1,372 people).
As of 2024, 299,100 residents or 4.4% of the population were not native-born in Bulgaria, compared to 2,548 people or 21.3% in Nauru.
Biggest cities by population
Compare countries by 7 more topics
Population differences between Bulgaria and Nauru
|
Bulgaria
|
Nauru
|
|
|---|---|---|
| Life expectancy | 76.1 years | 62.6 years |
| Average age | 44.2 years | 25.5 years |
| Median age | 45.7 years | 21.3 years |
| Male:Female ratio | 48.4:51.6 | 50.9:49.1 |
| Fertility rate | 1.72 births per woman | 3.29 births per woman |
| Population density | 152.5 ppl/mi² | 1,567 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/bulgaria/nauru | 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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