The latest officially reported population of Bulgaria was 6,433,302 in 2025 vs 5,413,813 people in Slovakia in 2025. In 2026, based on the adjusted UN estimation, the current Bulgaria's population is 6,390,149 people compared to 5,376,239 in Slovakia.
Population statistics:
- Bulgaria's population is 1.19 times bigger than Slovakia's.
- Bulgaria is ranked the 112th most populous country in the world, while Slovakia is the 125th.
- The countries together account for 0.14% of the world: 0.08% for Bulgaria vs 0.06% for Slovakia.
- For the last 10 years, Bulgaria has had an average growth rate of -0.86% per year vs -0.008% in Slovakia.
- Since 2006, the population of Bulgaria has decreased from 7.6M people to 6.39M (15.9% decline), while Slovakia has grown from 5.37M to 5.38M (0.06% growth).
Bulgaria vs Slovakia: population by year and forecast
| Year | Population | |
|---|---|---|
Bulgaria
|
Slovakia
|
|
| 2100 | 3,384,288 | 3,388,353 |
| 2099 | 3,408,821 | 3,410,527 |
| 2098 | 3,433,149 | 3,432,738 |
| 2097 | 3,457,549 | 3,454,958 |
| 2096 | 3,482,057 | 3,477,150 |
| 2095 | 3,506,060 | 3,499,531 |
| 2094 | 3,530,278 | 3,522,068 |
| 2093 | 3,554,432 | 3,544,820 |
| 2092 | 3,578,667 | 3,567,858 |
| 2091 | 3,602,907 | 3,591,243 |
| 2090 | 3,627,300 | 3,614,972 |
| 2089 | 3,652,188 | 3,639,184 |
| 2088 | 3,677,416 | 3,663,803 |
| 2087 | 3,703,460 | 3,688,979 |
| 2086 | 3,730,284 | 3,714,826 |
| 2085 | 3,757,953 | 3,741,361 |
| 2084 | 3,786,496 | 3,768,554 |
| 2083 | 3,815,548 | 3,796,482 |
| 2082 | 3,845,662 | 3,825,124 |
| 2081 | 3,876,344 | 3,854,574 |
| 2080 | 3,908,874 | 3,884,854 |
| 2079 | 3,942,344 | 3,915,890 |
| 2078 | 3,976,345 | 3,947,687 |
| 2077 | 4,011,440 | 3,980,420 |
| 2076 | 4,047,182 | 4,013,906 |
| 2075 | 4,083,977 | 4,048,115 |
| 2074 | 4,122,447 | 4,082,918 |
| 2073 | 4,161,511 | 4,118,344 |
| 2072 | 4,201,158 | 4,154,378 |
| 2071 | 4,241,639 | 4,190,678 |
| 2070 | 4,283,145 | 4,227,297 |
| 2069 | 4,325,083 | 4,264,100 |
| 2068 | 4,367,606 | 4,301,007 |
| 2067 | 4,411,116 | 4,337,728 |
| 2066 | 4,455,358 | 4,374,132 |
| 2065 | 4,500,141 | 4,410,344 |
| 2064 | 4,545,243 | 4,446,244 |
| 2063 | 4,590,439 | 4,481,639 |
| 2062 | 4,635,634 | 4,516,504 |
| 2061 | 4,681,315 | 4,550,644 |
| 2060 | 4,727,089 | 4,584,186 |
| 2059 | 4,772,667 | 4,616,990 |
| 2058 | 4,817,532 | 4,649,013 |
| 2057 | 4,862,597 | 4,680,116 |
| 2056 | 4,907,646 | 4,710,464 |
| 2055 | 4,953,105 | 4,739,960 |
| 2054 | 4,998,650 | 4,768,542 |
| 2053 | 5,044,397 | 4,796,670 |
| 2052 | 5,089,817 | 4,824,228 |
| 2051 | 5,135,505 | 4,851,216 |
| 2050 | 5,181,635 | 4,877,755 |
| 2049 | 5,228,058 | 4,903,974 |
| 2048 | 5,274,692 | 4,929,712 |
| 2047 | 5,322,212 | 4,955,205 |
| 2046 | 5,369,645 | 4,980,481 |
| 2045 | 5,417,381 | 5,005,547 |
| 2044 | 5,465,818 | 5,030,570 |
| 2043 | 5,514,902 | 5,055,426 |
| 2042 | 5,564,573 | 5,079,926 |
| 2041 | 5,615,489 | 5,104,270 |
| 2040 | 5,667,076 | 5,128,291 |
| 2039 | 5,719,506 | 5,151,796 |
| 2038 | 5,771,452 | 5,174,897 |
| 2037 | 5,824,628 | 5,197,430 |
| 2036 | 5,877,980 | 5,219,344 |
| 2035 | 5,930,517 | 5,240,519 |
| 2034 | 5,983,205 | 5,260,607 |
| 2033 | 6,036,049 | 5,279,808 |
| 2032 | 6,088,107 | 5,297,883 |
| 2031 | 6,140,619 | 5,314,815 |
| 2030 | 6,193,318 | 5,330,403 |
| 2029 | 6,244,785 | 5,344,463 |
| 2028 | 6,294,981 | 5,356,733 |
| 2027 | 6,343,732 | 5,367,421 |
| 2026 | 6,390,149 | 5,376,239 |
| 2025 | 6,433,302 | 5,413,813 |
| 2024 | 6,441,421 | 5,422,069 |
| 2023 | 6,446,596 | 5,426,740 |
| 2022 | 6,465,097 | 5,431,752 |
| 2021 | 6,507,301 | 5,447,247 |
| 2020 | 6,550,696 | 5,458,827 |
| 2019 | 6,616,726 | 5,454,147 |
| 2018 | 6,710,798 | 5,446,771 |
| 2017 | 6,803,468 | 5,439,232 |
| 2016 | 6,894,139 | 5,430,798 |
| 2015 | 6,984,225 | 5,423,801 |
| 2014 | 7,073,572 | 5,418,649 |
| 2013 | 7,160,005 | 5,413,393 |
| 2012 | 7,305,888 | 5,407,579 |
| 2011 | 7,348,328 | 5,398,384 |
| 2010 | 7,395,599 | 5,391,428 |
| 2009 | 7,444,443 | 5,386,406 |
| 2008 | 7,492,561 | 5,379,233 |
| 2007 | 7,545,338 | 5,374,622 |
| 2006 | 7,601,022 | 5,373,054 |
| 2005 | 7,658,972 | 5,372,807 |
| 2004 | 7,716,860 | 5,372,280 |
| 2003 | 7,775,327 | 5,373,374 |
| 2002 | 7,837,161 | 5,376,912 |
| 2001 | 8,009,142 | 5,378,867 |
| 2000 | 8,170,172 | 5,388,720 |
| 1999 | 8,210,624 | 5,396,020 |
| 1998 | 8,256,786 | 5,390,516 |
| 1997 | 8,312,068 | 5,383,291 |
| 1996 | 8,362,826 | 5,373,361 |
| 1995 | 8,406,067 | 5,361,999 |
| 1994 | 8,443,591 | 5,346,331 |
| 1993 | 8,472,313 | 5,325,305 |
| 1992 | 8,540,164 | 5,305,016 |
| 1991 | 8,632,367 | 5,303,294 |
| 1990 | 8,718,289 | 5,299,187 |
| 1989 | 8,876,972 | 5,275,942 |
| 1988 | 8,981,446 | 5,250,596 |
| 1987 | 8,971,359 | 5,222,840 |
| 1986 | 8,958,171 | 5,193,838 |
| 1985 | 8,960,547 | 5,161,768 |
| 1984 | 8,960,679 | 5,127,097 |
| 1983 | 8,939,738 | 5,091,971 |
| 1982 | 8,917,457 | 5,055,099 |
| 1981 | 8,891,117 | 5,016,105 |
| 1980 | 8,861,535 | 4,979,815 |
| 1979 | 8,825,940 | 4,938,973 |
| 1978 | 8,814,032 | 4,890,125 |
| 1977 | 8,804,183 | 4,840,501 |
| 1976 | 8,758,599 | 4,789,507 |
| 1975 | 8,720,742 | 4,739,105 |
| 1974 | 8,678,745 | 4,689,623 |
| 1973 | 8,620,967 | 4,641,445 |
| 1972 | 8,576,200 | 4,596,622 |
| 1971 | 8,536,395 | 4,557,449 |
| 1970 | 8,489,574 | 4,538,223 |
| 1969 | 8,434,172 | 4,518,607 |
| 1968 | 8,369,603 | 4,483,915 |
| 1967 | 8,310,226 | 4,449,367 |
| 1966 | 8,258,057 | 4,411,666 |
| 1965 | 8,204,168 | 4,370,983 |
| 1964 | 8,144,340 | 4,327,341 |
| 1963 | 8,078,145 | 4,282,017 |
| 1962 | 8,012,946 | 4,238,188 |
| 1961 | 7,943,118 | 4,191,667 |
| 1960 | 7,867,374 | 4,068,095 |
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/slovakia | CC BY 
From 2006 to 2016, the population of Bulgaria decreased by 706,883 people (a 9.3% decline), while Slovakia gained 57,744 people (a 1.07% growth).
For the next 10 years, from 2016 to 2026, Bulgaria lost 503,990 people (a 7.31% decline), while Slovakia's population decreased by 54,559 people (a 1% decline).
Bulgaria was ranked 95th most populous country in 2006 and is 112th in 2026. Slovakia was ranked 110th in 2006 and ranked 125th 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 Slovakia will decrease by 9.27% to 4,877,755 people and rank change from 125th to 129th.
Both countries are in a period of decline and in 50 years are projected to lose 36.7% of the population in Bulgaria and 25.3% in Slovakia.
Population growth rate by year
| Year | Growth rate | |
|---|---|---|
|
Bulgaria
|
Slovakia
|
|
| 2100 | -0.72% | -0.65% |
| 2099 | -0.71% | -0.65% |
| 2098 | -0.71% | -0.64% |
| 2097 | -0.7% | -0.64% |
| 2096 | -0.68% | -0.64% |
| 2095 | -0.69% | -0.64% |
| 2094 | -0.68% | -0.64% |
| 2093 | -0.68% | -0.65% |
| 2092 | -0.67% | -0.65% |
| 2091 | -0.67% | -0.66% |
| 2090 | -0.68% | -0.67% |
| 2089 | -0.69% | -0.67% |
| 2088 | -0.7% | -0.68% |
| 2087 | -0.72% | -0.7% |
| 2086 | -0.74% | -0.71% |
| 2085 | -0.75% | -0.72% |
| 2084 | -0.76% | -0.74% |
| 2083 | -0.78% | -0.75% |
| 2082 | -0.79% | -0.76% |
| 2081 | -0.83% | -0.78% |
| 2080 | -0.85% | -0.79% |
| 2079 | -0.86% | -0.81% |
| 2078 | -0.87% | -0.82% |
| 2077 | -0.88% | -0.83% |
| 2076 | -0.9% | -0.85% |
| 2075 | -0.93% | -0.85% |
| 2074 | -0.94% | -0.86% |
| 2073 | -0.94% | -0.87% |
| 2072 | -0.95% | -0.87% |
| 2071 | -0.97% | -0.87% |
| 2070 | -0.97% | -0.86% |
| 2069 | -0.97% | -0.86% |
| 2068 | -0.99% | -0.85% |
| 2067 | -0.99% | -0.83% |
| 2066 | -1% | -0.82% |
| 2065 | -0.99% | -0.81% |
| 2064 | -0.98% | -0.79% |
| 2063 | -0.97% | -0.77% |
| 2062 | -0.98% | -0.75% |
| 2061 | -0.97% | -0.73% |
| 2060 | -0.95% | -0.71% |
| 2059 | -0.93% | -0.69% |
| 2058 | -0.93% | -0.66% |
| 2057 | -0.92% | -0.64% |
| 2056 | -0.92% | -0.62% |
| 2055 | -0.91% | -0.6% |
| 2054 | -0.91% | -0.59% |
| 2053 | -0.89% | -0.57% |
| 2052 | -0.89% | -0.56% |
| 2051 | -0.89% | -0.54% |
| 2050 | -0.89% | -0.53% |
| 2049 | -0.88% | -0.52% |
| 2048 | -0.89% | -0.51% |
| 2047 | -0.88% | -0.51% |
| 2046 | -0.88% | -0.5% |
| 2045 | -0.89% | -0.5% |
| 2044 | -0.89% | -0.49% |
| 2043 | -0.89% | -0.48% |
| 2042 | -0.91% | -0.48% |
| 2041 | -0.91% | -0.47% |
| 2040 | -0.92% | -0.46% |
| 2039 | -0.9% | -0.45% |
| 2038 | -0.91% | -0.43% |
| 2037 | -0.91% | -0.42% |
| 2036 | -0.89% | -0.4% |
| 2035 | -0.88% | -0.38% |
| 2034 | -0.88% | -0.36% |
| 2033 | -0.86% | -0.34% |
| 2032 | -0.86% | -0.32% |
| 2031 | -0.85% | -0.29% |
| 2030 | -0.82% | -0.26% |
| 2029 | -0.8% | -0.23% |
| 2028 | -0.77% | -0.2% |
| 2027 | -0.73% | -0.16% |
| 2026 | -0.67% | -0.69% |
| 2025 | -0.13% | -0.15% |
| 2024 | -0.08% | -0.09% |
| 2023 | -0.29% | -0.09% |
| 2022 | -0.65% | -0.28% |
| 2021 | -0.66% | -0.21% |
| 2020 | -1% | 0.09% |
| 2019 | -1.4% | 0.14% |
| 2018 | -1.36% | 0.14% |
| 2017 | -1.32% | 0.16% |
| 2016 | -1.29% | 0.13% |
| 2015 | -1.26% | 0.1% |
| 2014 | -1.21% | 0.1% |
| 2013 | -2% | 0.11% |
| 2012 | -0.58% | 0.17% |
| 2011 | -0.64% | 0.13% |
| 2010 | -0.66% | 0.09% |
| 2009 | -0.64% | 0.13% |
| 2008 | -0.7% | 0.09% |
| 2007 | -0.73% | 0.03% |
| 2006 | -0.76% | 0.005% |
| 2005 | -0.75% | 0.01% |
| 2004 | -0.75% | -0.02% |
| 2003 | -0.79% | -0.07% |
| 2002 | -2.15% | -0.04% |
| 2001 | -1.97% | -0.18% |
| 2000 | -0.49% | -0.14% |
| 1999 | -0.56% | 0.1% |
| 1998 | -0.67% | 0.13% |
| 1997 | -0.61% | 0.18% |
| 1996 | -0.51% | 0.21% |
| 1995 | -0.44% | 0.29% |
| 1994 | -0.34% | 0.39% |
| 1993 | -0.79% | 0.38% |
| 1992 | -1.07% | 0.03% |
| 1991 | -0.99% | 0.08% |
| 1990 | -1.79% | 0.44% |
| 1989 | -1.16% | 0.48% |
| 1988 | 0.11% | 0.53% |
| 1987 | 0.15% | 0.56% |
| 1986 | -0.03% | 0.62% |
| 1985 | -0.001% | 0.68% |
| 1984 | 0.23% | 0.69% |
| 1983 | 0.25% | 0.73% |
| 1982 | 0.3% | 0.78% |
| 1981 | 0.33% | 0.73% |
| 1980 | 0.4% | 0.83% |
| 1979 | 0.14% | 1% |
| 1978 | 0.11% | 1.03% |
| 1977 | 0.52% | 1.06% |
| 1976 | 0.43% | 1.06% |
| 1975 | 0.48% | 1.06% |
| 1974 | 0.67% | 1.04% |
| 1973 | 0.52% | 0.98% |
| 1972 | 0.47% | 0.86% |
| 1971 | 0.55% | 0.42% |
| 1970 | 0.66% | 0.43% |
| 1969 | 0.77% | 0.77% |
| 1968 | 0.71% | 0.78% |
| 1967 | 0.63% | 0.85% |
| 1966 | 0.66% | 0.93% |
| 1965 | 0.73% | 1.01% |
| 1964 | 0.82% | 1.06% |
| 1963 | 0.81% | 1.03% |
| 1962 | 0.88% | 1.11% |
| 1961 | 0.96% | 3.04% |
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/slovakia | CC BY
In 2025, the population of Bulgaria declined by 0.13%, while Slovakia's population declined by 0.15%.
Live population counters
|
Bulgaria
|
Slovakia
|
|
|---|---|---|
| Current population |
6390149
|
5376239
|
| Population rank | 112/197 | 125/197 |
| Percent of world population | 0.08% | 0.06% |
| One net population change |
1.08 hours
|
1.06 hours
|
| One birth every |
9.83 minutes
|
11.4 minutes
|
| One death every |
5.23 minutes
|
9.79 minutes
|
| Daily growth/decline | -22 | -23 |
| Annual growth/decline | -8,119 | -8,256 |
| Annual growth/decline rate | -0.13% | -0.15% |
| Population growth rate rank | 168/197 | 170/197 |
| One migration net change every |
2.97 hours
|
16.8 minutes
|
| Annual migration change | -2,961 | -31,377 |
| Net migration rank | 106/196 | 166/196 |
| Foreign-born residents | 299,100 | 323,991 |
| Foreign-born residents rank | 98/195 | 96/195 |
| Foreign-born share of population | 4.4% | 5.9% |
| Foreign-born share rank | 99/195 | 88/195 |
Natural population change vs migration
| Year | Population change | |||
|---|---|---|---|---|
|
Bulgaria
|
Slovakia
|
|||
| Natural | Migration | Natural | Migration | |
| 2025 | - | -2,961 | - | -31,377 |
| 2024 | -47,023 | 524 | -7,591 | -21,027 |
| 2023 | -43,837 | 5,173 | -5,427 | 4,933 |
| 2022 | -62,065 | 26,498 | -7,062 | 92,314 |
| 2021 | -90,452 | 11,756 | -16,886 | -8,172 |
| 2020 | -65,507 | 30,167 | -2,184 | 4,350 |
| 2019 | -46,317 | -2,156 | 3,818 | 3,128 |
| 2018 | -46,304 | -3,873 | 3,268 | 3,446 |
| 2017 | -45,583 | -6,109 | 4,351 | 3,279 |
| 2016 | -42,744 | -9,482 | 5,431 | 3,487 |
| 2015 | -44,699 | -4,227 | 2,170 | 2,549 |
| 2014 | -41,027 | -2,180 | 3,793 | -1,158 |
| 2013 | -37,948 | -1,324 | 2,707 | -1,181 |
| 2012 | -40,183 | -26,334 | 3,245 | 871 |
| 2011 | -37,477 | -23,360 | 9,177 | -2,392 |
| 2010 | -34,759 | -21,668 | 7,008 | -1,814 |
| 2009 | -26,800 | -19,060 | 8,619 | -542 |
| 2008 | -32,967 | -17,595 | 4,303 | -495 |
| 2007 | -37,727 | -16,366 | 537 | -571 |
| 2006 | -39,526 | -15,184 | 537 | -549 |
| 2005 | -42,124 | -14,435 | 537 | -561 |
| 2004 | -40,128 | -13,604 | 1,611 | -522 |
| 2003 | -44,319 | -13,183 | -537 | -646 |
| 2002 | -46,240 | -12,735 | -538 | -580 |
| 2001 | -44,050 | -30,726 | -1,076 | -860 |
| 2000 | -41,668 | -26,211 | 2,155 | -831 |
| 1999 | -39,411 | -23,846 | 3,777 | -119 |
| 1998 | -52,844 | -23,262 | 4,312 | -12 |
| 1997 | -58,185 | -22,963 | 6,999 | 247 |
| 1996 | -45,159 | -21,520 | 9,135 | 246 |
| 1995 | -42,030 | -22,020 | 9,115 | -30 |
| 1994 | -32,086 | -20,984 | 14,970 | -109 |
| 1993 | -24,569 | -19,973 | 20,769 | 72 |
| 1992 | -18,789 | -120,552 | 21,220 | -201 |
| 1991 | -14,675 | -119,356 | 23,865 | 174 |
| 1990 | -3,487 | -116,817 | 25,436 | -9,402 |
| 1989 | 5,326 | -114,705 | 26,380 | -7,254 |
| 1988 | 9,879 | 215 | 30,979 | -6,500 |
| 1987 | 8,971 | 357 | 31,859 | -6,401 |
| 1986 | 16,125 | 1,104 | 34,279 | -6,143 |
| 1985 | 11,649 | -19,230 | 37,680 | -6,068 |
| 1984 | 20,610 | -1,032 | 38,966 | -6,276 |
| 1983 | 21,455 | -1,872 | 39,717 | -6,361 |
| 1982 | 24,077 | -1,860 | 41,958 | -6,088 |
| 1981 | 29,341 | -1,830 | 43,640 | -5,821 |
| 1980 | 30,129 | -2,045 | 44,320 | -5,522 |
| 1979 | 40,599 | -872 | 52,353 | -4,712 |
| 1978 | 44,070 | -62,769 | 52,324 | -4,689 |
| 1977 | 47,543 | -11,955 | 52,762 | -4,621 |
| 1976 | 56,055 | -2,522 | 54,121 | -4,432 |
| 1975 | 54,941 | -38,071 | 52,604 | -4,652 |
| 1974 | 64,223 | -1,402 | 52,524 | -4,190 |
| 1973 | 57,760 | -5,409 | 49,199 | -3,854 |
| 1972 | 47,169 | -11,296 | 46,426 | -3,516 |
| 1971 | 52,925 | -7,654 | 40,105 | -3,495 |
| 1970 | 61,125 | -11,315 | 38,575 | -4,919 |
| 1969 | 63,256 | -3,204 | 39,312 | -8,998 |
| 1968 | 69,468 | -132 | 38,113 | -8,881 |
| 1967 | 49,861 | -420 | 41,824 | -8,876 |
| 1966 | 54,504 | -144 | 45,440 | -8,817 |
| 1965 | 58,249 | -1,406 | 48,517 | -8,707 |
| 1964 | 66,783 | 505 | 54,092 | -8,608 |
| 1963 | 66,241 | 500 | 54,382 | -8,548 |
| 1962 | 64,104 | 499 | 49,587 | -9,019 |
| 1961 | 75,460 | 378 | 55,749 | 4,812 |
| 1960 | 76,314 | -1,112 | 56,546 | 4,344 |
Data sources: World Bank | Health (1960–2025, retrieved 2026-07-08).
GeoRank.org/population/bulgaria/slovakia | 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 Slovakia 18.6% is from natural causes (a loss of 20,112 people) and 81.4% is from migration (a gain of 88,287 people).
As of 2024, 299,100 residents or 4.4% of the population were not native-born in Bulgaria, compared to 323,991 people or 5.9% in Slovakia.
Biggest cities by population
|
Bulgaria
|
|
|---|---|
| City | Population |
| Sofia | 1.21M |
| Plovdiv | 334K |
| Varna | 323K |
| Burgas | 189K |
| Stara Zagora | 121K |
| Ruse | 120K |
| Pleven | 88.1K |
| Sliven | 77.8K |
| Dobrich | 68.6K |
| Shumen | 66.4K |
|
Slovakia
|
|
|---|---|
| City | Population |
| Bratislava | 481K |
| Kosice | 222K |
| Presov | 81.2K |
| Zilina | 79.9K |
| Nitra | 75.3K |
| Banska Bystrica | 73.1K |
| Trnava | 63.2K |
| Trencin | 54.1K |
| Martin | 50.2K |
| Poprad | 48K |
Compare countries by 7 more topics
Population differences between Bulgaria and Slovakia
|
Bulgaria
|
Slovakia
|
|
|---|---|---|
| Life expectancy | 76.1 years | 78.8 years |
| Average age | 44.2 years | 42.3 years |
| Median age | 45.7 years | 43.3 years |
| Male:Female ratio | 48.4:51.6 | 48.8:51.2 |
| Fertility rate | 1.72 births per woman | 1.46 births per woman |
| Population density | 152.5 ppl/mi² | 289.6 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/slovakia | 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)
- Wikidata (2026, retrieved 2026-07-08)
- Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-07-08)
Creative Commons Attribution (CC BY) — you’re free to copy, share, remix, adapt, and use even commercially as long as you give appropriate credit and clearly indicate if you made changes. Other sources may be subject to different license terms.