The latest officially reported population of Belgium was 11,941,781 in 2025 vs 5,513,282 people in the Central African Republic in 2025. In 2026, based on the adjusted UN estimation, the current Belgium's population is 11,967,185 people compared to 5,798,457 in the Central African Republic.
Population statistics:
- Belgium's population is 2.06 times bigger than the Central African Republic's.
- Belgium is ranked the 83rd most populous country in the world, while the Central African Republic is the 117th.
- The countries together account for 0.21% of the world: 0.14% for Belgium vs 0.07% for the Central African Republic.
- For the last 10 years, Belgium has had an average growth rate of +0.58% per year vs +1.62% in the Central African Republic.
- Since 2006, the population of Belgium has increased from 10.5M people to 12M (13.5% growth), while the Central African Republic has grown from 4.38M to 5.8M (32.5% growth).
Belgium vs Central African Republic: population by year and forecast
| Year | Population | |
|---|---|---|
Belgium
|
CAR
|
|
| 2100 | 11,250,862 | 19,061,127 |
| 2099 | 11,269,247 | 18,981,009 |
| 2098 | 11,287,433 | 18,896,319 |
| 2097 | 11,303,694 | 18,810,793 |
| 2096 | 11,319,229 | 18,719,993 |
| 2095 | 11,335,187 | 18,621,666 |
| 2094 | 11,351,692 | 18,521,650 |
| 2093 | 11,367,258 | 18,420,299 |
| 2092 | 11,383,419 | 18,311,751 |
| 2091 | 11,397,881 | 18,200,580 |
| 2090 | 11,412,370 | 18,083,097 |
| 2089 | 11,426,889 | 17,968,298 |
| 2088 | 11,442,238 | 17,844,377 |
| 2087 | 11,457,739 | 17,717,148 |
| 2086 | 11,472,102 | 17,581,447 |
| 2085 | 11,485,745 | 17,447,157 |
| 2084 | 11,499,703 | 17,306,435 |
| 2083 | 11,513,055 | 17,159,818 |
| 2082 | 11,527,480 | 17,010,036 |
| 2081 | 11,539,632 | 16,860,592 |
| 2080 | 11,553,646 | 16,704,486 |
| 2079 | 11,566,656 | 16,552,105 |
| 2078 | 11,580,982 | 16,392,201 |
| 2077 | 11,593,809 | 16,224,015 |
| 2076 | 11,605,311 | 16,051,483 |
| 2075 | 11,617,264 | 15,877,563 |
| 2074 | 11,630,340 | 15,706,759 |
| 2073 | 11,643,635 | 15,526,382 |
| 2072 | 11,656,916 | 15,346,626 |
| 2071 | 11,670,459 | 15,158,906 |
| 2070 | 11,686,541 | 14,964,276 |
| 2069 | 11,702,841 | 14,768,967 |
| 2068 | 11,720,297 | 14,572,130 |
| 2067 | 11,737,631 | 14,369,861 |
| 2066 | 11,756,233 | 14,167,129 |
| 2065 | 11,776,031 | 13,963,573 |
| 2064 | 11,796,981 | 13,758,257 |
| 2063 | 11,818,873 | 13,545,150 |
| 2062 | 11,841,060 | 13,332,625 |
| 2061 | 11,864,790 | 13,120,271 |
| 2060 | 11,886,277 | 12,903,195 |
| 2059 | 11,907,924 | 12,684,791 |
| 2058 | 11,928,140 | 12,464,271 |
| 2057 | 11,951,275 | 12,242,308 |
| 2056 | 11,972,819 | 12,020,446 |
| 2055 | 11,992,614 | 11,797,986 |
| 2054 | 12,011,260 | 11,575,058 |
| 2053 | 12,029,602 | 11,351,527 |
| 2052 | 12,045,984 | 11,128,939 |
| 2051 | 12,059,458 | 10,908,122 |
| 2050 | 12,070,180 | 10,686,324 |
| 2049 | 12,079,277 | 10,468,520 |
| 2048 | 12,086,376 | 10,249,810 |
| 2047 | 12,091,336 | 10,034,764 |
| 2046 | 12,094,512 | 9,819,986 |
| 2045 | 12,096,264 | 9,606,504 |
| 2044 | 12,095,660 | 9,394,614 |
| 2043 | 12,094,445 | 9,185,941 |
| 2042 | 12,092,240 | 8,980,018 |
| 2041 | 12,088,320 | 8,774,893 |
| 2040 | 12,084,611 | 8,567,893 |
| 2039 | 12,080,011 | 8,358,128 |
| 2038 | 12,074,019 | 8,149,514 |
| 2037 | 12,067,048 | 7,942,721 |
| 2036 | 12,060,663 | 7,734,436 |
| 2035 | 12,054,093 | 7,525,805 |
| 2034 | 12,047,026 | 7,314,741 |
| 2033 | 12,038,587 | 7,105,166 |
| 2032 | 12,030,514 | 6,897,152 |
| 2031 | 12,022,079 | 6,690,066 |
| 2030 | 12,012,501 | 6,486,667 |
| 2029 | 12,000,773 | 6,286,290 |
| 2028 | 11,988,034 | 6,085,426 |
| 2027 | 11,974,384 | 5,890,999 |
| 2026 | 11,959,583 | 5,700,718 |
| 2025 | 11,941,781 | 5,513,282 |
| 2024 | 11,858,610 | 5,330,690 |
| 2023 | 11,779,946 | 5,152,421 |
| 2022 | 11,680,210 | 5,098,039 |
| 2021 | 11,586,195 | 5,112,100 |
| 2020 | 11,538,604 | 5,026,628 |
| 2019 | 11,488,980 | 4,944,703 |
| 2018 | 11,427,054 | 4,878,657 |
| 2017 | 11,375,158 | 4,793,511 |
| 2016 | 11,331,422 | 4,713,663 |
| 2015 | 11,274,196 | 4,629,320 |
| 2014 | 11,209,057 | 4,623,182 |
| 2013 | 11,159,407 | 4,642,419 |
| 2012 | 11,106,932 | 4,610,848 |
| 2011 | 11,038,264 | 4,565,021 |
| 2010 | 10,895,586 | 4,492,995 |
| 2009 | 10,796,493 | 4,529,047 |
| 2008 | 10,709,973 | 4,558,984 |
| 2007 | 10,625,700 | 4,462,770 |
| 2006 | 10,547,958 | 4,377,579 |
| 2005 | 10,478,617 | 4,288,810 |
| 2004 | 10,421,137 | 4,192,826 |
| 2003 | 10,376,133 | 4,103,086 |
| 2002 | 10,332,785 | 4,006,077 |
| 2001 | 10,286,570 | 3,919,487 |
| 2000 | 10,251,250 | 3,833,416 |
| 1999 | 10,226,419 | 3,729,450 |
| 1998 | 10,203,008 | 3,628,827 |
| 1997 | 10,181,245 | 3,531,700 |
| 1996 | 10,156,637 | 3,435,965 |
| 1995 | 10,136,811 | 3,348,052 |
| 1994 | 10,115,603 | 3,257,954 |
| 1993 | 10,084,475 | 3,157,839 |
| 1992 | 10,045,158 | 3,058,831 |
| 1991 | 10,004,486 | 2,963,191 |
| 1990 | 9,967,379 | 2,871,910 |
| 1989 | 9,937,697 | 2,783,970 |
| 1988 | 9,901,664 | 2,713,965 |
| 1987 | 9,870,234 | 2,669,155 |
| 1986 | 9,861,823 | 2,634,258 |
| 1985 | 9,858,308 | 2,600,932 |
| 1984 | 9,855,372 | 2,568,610 |
| 1983 | 9,855,520 | 2,537,399 |
| 1982 | 9,856,303 | 2,507,375 |
| 1981 | 9,858,982 | 2,478,402 |
| 1980 | 9,859,242 | 2,450,535 |
| 1979 | 9,848,382 | 2,423,794 |
| 1978 | 9,839,534 | 2,397,961 |
| 1977 | 9,830,358 | 2,372,930 |
| 1976 | 9,818,227 | 2,348,566 |
| 1975 | 9,800,700 | 2,313,916 |
| 1974 | 9,772,419 | 2,269,338 |
| 1973 | 9,741,720 | 2,226,008 |
| 1972 | 9,711,115 | 2,183,769 |
| 1971 | 9,673,162 | 2,141,450 |
| 1970 | 9,655,549 | 2,097,505 |
| 1969 | 9,646,032 | 2,051,515 |
| 1968 | 9,618,756 | 2,005,100 |
| 1967 | 9,580,991 | 1,960,444 |
| 1966 | 9,527,807 | 1,918,082 |
| 1965 | 9,463,667 | 1,877,854 |
| 1964 | 9,378,113 | 1,839,583 |
| 1963 | 9,289,770 | 1,803,063 |
| 1962 | 9,220,578 | 1,768,115 |
| 1961 | 9,183,948 | 1,734,580 |
| 1960 | 9,153,489 | 1,702,346 |
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/belgium/central-african-republic | CC BY 
From 2006 to 2016, the population of Belgium increased by 783,464 people (a 7.43% growth), while the Central African Republic gained 336,084 people (a 7.68% growth).
For the next 10 years, from 2016 to 2026, Belgium gained 635,763 people (a 5.61% growth), while the Central African Republic's population increased by 1,084,794 people (a 23% growth).
Belgium was ranked 77th most populous country in 2006 and is 83rd in 2026. The Central African Republic was ranked 118th in 2006 and ranked 117th now.
The UN's World Population Prospects forecasts that in 24 years (in 2050) Belgium's population will grow by 0.86% to 12,070,180 people with a rank change from 83rd to 92nd. The population of the Central African Republic will increase by 84.3% to 10,686,324 people and rank change from 117th to 96th.
Belgium is projected to reach its peak in 2045 at 12.1M people compared to the peak of 19.1M people in 2100 for the Central African Republic.
Population growth rate by year
| Year | Growth rate | |
|---|---|---|
|
Belgium
|
CAR
|
|
| 2100 | -0.16% | 0.42% |
| 2099 | -0.16% | 0.45% |
| 2098 | -0.14% | 0.45% |
| 2097 | -0.14% | 0.49% |
| 2096 | -0.14% | 0.53% |
| 2095 | -0.15% | 0.54% |
| 2094 | -0.14% | 0.55% |
| 2093 | -0.14% | 0.59% |
| 2092 | -0.13% | 0.61% |
| 2091 | -0.13% | 0.65% |
| 2090 | -0.13% | 0.64% |
| 2089 | -0.13% | 0.69% |
| 2088 | -0.14% | 0.72% |
| 2087 | -0.13% | 0.77% |
| 2086 | -0.12% | 0.77% |
| 2085 | -0.12% | 0.81% |
| 2084 | -0.12% | 0.85% |
| 2083 | -0.13% | 0.88% |
| 2082 | -0.11% | 0.89% |
| 2081 | -0.12% | 0.93% |
| 2080 | -0.11% | 0.92% |
| 2079 | -0.12% | 0.98% |
| 2078 | -0.11% | 1.04% |
| 2077 | -0.1% | 1.07% |
| 2076 | -0.1% | 1.1% |
| 2075 | -0.11% | 1.09% |
| 2074 | -0.11% | 1.16% |
| 2073 | -0.11% | 1.17% |
| 2072 | -0.12% | 1.24% |
| 2071 | -0.14% | 1.3% |
| 2070 | -0.14% | 1.32% |
| 2069 | -0.15% | 1.35% |
| 2068 | -0.15% | 1.41% |
| 2067 | -0.16% | 1.43% |
| 2066 | -0.17% | 1.46% |
| 2065 | -0.18% | 1.49% |
| 2064 | -0.19% | 1.57% |
| 2063 | -0.19% | 1.59% |
| 2062 | -0.2% | 1.62% |
| 2061 | -0.18% | 1.68% |
| 2060 | -0.18% | 1.72% |
| 2059 | -0.17% | 1.77% |
| 2058 | -0.19% | 1.81% |
| 2057 | -0.18% | 1.85% |
| 2056 | -0.17% | 1.89% |
| 2055 | -0.16% | 1.93% |
| 2054 | -0.15% | 1.97% |
| 2053 | -0.14% | 2% |
| 2052 | -0.11% | 2.02% |
| 2051 | -0.09% | 2.08% |
| 2050 | -0.08% | 2.08% |
| 2049 | -0.06% | 2.13% |
| 2048 | -0.04% | 2.14% |
| 2047 | -0.03% | 2.19% |
| 2046 | -0.01% | 2.22% |
| 2045 | 0.005% | 2.26% |
| 2044 | 0.01% | 2.27% |
| 2043 | 0.02% | 2.29% |
| 2042 | 0.03% | 2.34% |
| 2041 | 0.03% | 2.42% |
| 2040 | 0.04% | 2.51% |
| 2039 | 0.05% | 2.56% |
| 2038 | 0.06% | 2.6% |
| 2037 | 0.05% | 2.69% |
| 2036 | 0.05% | 2.77% |
| 2035 | 0.06% | 2.89% |
| 2034 | 0.07% | 2.95% |
| 2033 | 0.07% | 3.02% |
| 2032 | 0.07% | 3.1% |
| 2031 | 0.08% | 3.14% |
| 2030 | 0.1% | 3.19% |
| 2029 | 0.11% | 3.3% |
| 2028 | 0.11% | 3.3% |
| 2027 | 0.12% | 3.34% |
| 2026 | 0.15% | 3.4% |
| 2025 | 0.7% | 3.43% |
| 2024 | 0.67% | 3.46% |
| 2023 | 0.85% | 1.07% |
| 2022 | 0.81% | -0.28% |
| 2021 | 0.41% | 1.7% |
| 2020 | 0.43% | 1.66% |
| 2019 | 0.54% | 1.35% |
| 2018 | 0.46% | 1.78% |
| 2017 | 0.39% | 1.69% |
| 2016 | 0.51% | 1.82% |
| 2015 | 0.58% | 0.13% |
| 2014 | 0.44% | -0.41% |
| 2013 | 0.47% | 0.68% |
| 2012 | 0.62% | 1% |
| 2011 | 1.31% | 1.6% |
| 2010 | 0.92% | -0.8% |
| 2009 | 0.81% | -0.66% |
| 2008 | 0.79% | 2.16% |
| 2007 | 0.74% | 1.95% |
| 2006 | 0.66% | 2.07% |
| 2005 | 0.55% | 2.29% |
| 2004 | 0.43% | 2.19% |
| 2003 | 0.42% | 2.42% |
| 2002 | 0.45% | 2.21% |
| 2001 | 0.34% | 2.25% |
| 2000 | 0.24% | 2.79% |
| 1999 | 0.23% | 2.77% |
| 1998 | 0.21% | 2.75% |
| 1997 | 0.24% | 2.79% |
| 1996 | 0.2% | 2.63% |
| 1995 | 0.21% | 2.77% |
| 1994 | 0.31% | 3.17% |
| 1993 | 0.39% | 3.24% |
| 1992 | 0.41% | 3.23% |
| 1991 | 0.37% | 3.18% |
| 1990 | 0.3% | 3.16% |
| 1989 | 0.36% | 2.58% |
| 1988 | 0.32% | 1.68% |
| 1987 | 0.09% | 1.32% |
| 1986 | 0.04% | 1.28% |
| 1985 | 0.03% | 1.26% |
| 1984 | -0.002% | 1.23% |
| 1983 | -0.008% | 1.2% |
| 1982 | -0.03% | 1.17% |
| 1981 | -0.003% | 1.14% |
| 1980 | 0.11% | 1.1% |
| 1979 | 0.09% | 1.08% |
| 1978 | 0.09% | 1.05% |
| 1977 | 0.12% | 1.04% |
| 1976 | 0.18% | 1.5% |
| 1975 | 0.29% | 1.96% |
| 1974 | 0.32% | 1.95% |
| 1973 | 0.32% | 1.93% |
| 1972 | 0.39% | 1.98% |
| 1971 | 0.18% | 2.1% |
| 1970 | 0.1% | 2.24% |
| 1969 | 0.28% | 2.31% |
| 1968 | 0.39% | 2.28% |
| 1967 | 0.56% | 2.21% |
| 1966 | 0.68% | 2.14% |
| 1965 | 0.91% | 2.08% |
| 1964 | 0.95% | 2.03% |
| 1963 | 0.75% | 1.98% |
| 1962 | 0.4% | 1.93% |
| 1961 | 0.33% | 1.89% |
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/belgium/central-african-republic | CC BY
In 2025, the population of Belgium grew by 0.7%, while the Central African Republic's population grew by 3.43%.
Live population counters
|
Belgium
|
CAR
|
|
|---|---|---|
| Current population |
11967185
|
5798457
|
| Population rank | 83/197 | 117/197 |
| Percent of world population | 0.14% | 0.07% |
| One net population change |
6.34 minutes
|
2.89 minutes
|
| One birth every |
4.82 minutes
|
2.13 minutes
|
| One death every |
4.67 minutes
|
10.5 minutes
|
| Daily growth/decline | +228 | +500 |
| Annual growth/decline | +83,171 | +182,592 |
| Annual growth/decline rate | +0.7% | +3.43% |
| Population growth rate rank | 116/197 | 7/197 |
| One migration net change every |
16.5 minutes
|
35.9 minutes
|
| Annual migration change | +31,989 | -14,693 |
| Net migration rank | 28/196 | 143/196 |
| Foreign-born residents | 2,349,032 | 94,556 |
| Foreign-born residents rank | 30/195 | 132/195 |
| Foreign-born share of population | 20% | 1.8% |
| Foreign-born share rank | 30/195 | 135/195 |
Natural population change vs migration
| Year | Population change | |||
|---|---|---|---|---|
|
Belgium
|
CAR
|
|||
| Natural | Migration | Natural | Migration | |
| 2025 | - | 31,989 | - | -14,693 |
| 2024 | -3,557 | 36,243 | 196,244 | -15,357 |
| 2023 | 0 | 41,679 | 190,325 | -14,682 |
| 2022 | -2,336 | 118,615 | -49,456 | -17,430 |
| 2021 | 5,793 | 24,017 | 124,408 | -85,646 |
| 2020 | -12,692 | 43,777 | 156,911 | -24,745 |
| 2019 | 8,042 | 58,469 | 68,523 | -36,849 |
| 2018 | 7,999 | 50,604 | 153,361 | -52,954 |
| 2017 | 10,238 | 37,981 | 128,461 | -58,584 |
| 2016 | 14,731 | 28,090 | 142,419 | -52,607 |
| 2015 | 11,274 | 63,536 | 141,912 | -63,045 |
| 2014 | 21,297 | 37,472 | 107,448 | -174,051 |
| 2013 | 16,739 | 28,066 | 140,489 | -112,382 |
| 2012 | 18,882 | 45,001 | 146,791 | -111,764 |
| 2011 | 25,388 | 52,464 | 142,913 | -86,281 |
| 2010 | 23,970 | 105,232 | 130,539 | -43,126 |
| 2009 | 23,752 | 97,175 | -130,613 | -28,899 |
| 2008 | 22,491 | 66,470 | 128,627 | -28,983 |
| 2007 | 23,376 | 59,911 | 123,137 | -30,352 |
| 2006 | 21,096 | 53,574 | 118,882 | -41,282 |
| 2005 | 15,718 | 50,576 | 113,534 | -13,604 |
| 2004 | 16,673 | 35,143 | 108,548 | -16,510 |
| 2003 | 7,263 | 34,472 | 105,540 | -18,097 |
| 2002 | 7,233 | 39,404 | 100,588 | 5,992 |
| 2001 | 11,315 | 34,924 | 99,598 | -33,006 |
| 2000 | 12,302 | 13,952 | 97,468 | 8,079 |
| 1999 | 9,203 | 16,849 | 96,108 | 6,284 |
| 1998 | 9,183 | 12,517 | 94,361 | 4,479 |
| 1997 | 12,218 | 10,262 | 93,378 | 2,034 |
| 1996 | 12,188 | 15,684 | 93,369 | 2,697 |
| 1995 | 11,150 | 1,937 | 92,748 | -12,986 |
| 1994 | 12,139 | 17,636 | 90,943 | 9,496 |
| 1993 | 14,118 | 18,542 | 89,873 | 9,930 |
| 1992 | 20,090 | 25,941 | 88,939 | 9,269 |
| 1991 | 22,010 | 27,038 | 88,688 | 4,381 |
| 1990 | 19,935 | 8,299 | 87,507 | 1,995 |
| 1989 | 13,912 | 7,301 | 85,969 | 409 |
| 1988 | 14,853 | 3,929 | 84,654 | -31,016 |
| 1987 | 11,844 | 3,525 | 83,408 | -47,428 |
| 1986 | 5,917 | 2,964 | 81,149 | -47,332 |
| 1985 | 2,958 | 2,165 | 79,266 | -46,427 |
| 1984 | 4,927 | 1,697 | 77,395 | -45,591 |
| 1983 | 2,956 | 1,252 | 75,399 | -44,780 |
| 1982 | 7,885 | 1,100 | 73,330 | -43,908 |
| 1981 | 11,831 | 2,826 | 71,391 | -42,872 |
| 1980 | 10,845 | 11,482 | 68,759 | -41,539 |
| 1979 | 11,818 | 11,277 | 66,104 | -39,850 |
| 1978 | 7,872 | 10,828 | 63,285 | -37,874 |
| 1977 | 8,847 | 10,460 | 60,436 | -35,782 |
| 1976 | 1,964 | 10,360 | 57,725 | -33,645 |
| 1975 | 0 | 9,652 | 55,106 | -9,895 |
| 1974 | 7,818 | 8,924 | 53,777 | -9,838 |
| 1973 | 11,690 | 8,684 | 52,525 | -9,800 |
| 1972 | 18,451 | 8,384 | 51,390 | -9,634 |
| 1971 | 21,281 | 7,992 | 50,142 | -7,259 |
| 1970 | 23,173 | 19,393 | 48,690 | -3,693 |
| 1969 | 21,221 | 20,072 | 47,066 | -80 |
| 1968 | 20,199 | 19,809 | 45,377 | 474 |
| 1967 | 31,618 | 19,492 | 42,979 | 474 |
| 1966 | 36,206 | 18,985 | 40,804 | 474 |
| 1965 | 39,748 | 18,243 | 38,710 | 474 |
| 1964 | 51,580 | 17,687 | 36,878 | 474 |
| 1963 | 41,804 | 16,355 | 35,218 | 474 |
| 1962 | 42,414 | 14,829 | 33,731 | 474 |
| 1961 | 52,349 | 10,566 | 32,383 | 474 |
| 1960 | 40,275 | 9,893 | 31,131 | 474 |
Data sources: World Bank | Health (1960–2025, retrieved 2026-07-08).
GeoRank.org/population/belgium/central-african-republic | CC BY
Over the last 10 years, 7.28% of the population change in Belgium is from natural causes (a gain of 39,492 people) and 92.7% is from migration (a gain of 503,011 people). In the Central African Republic 74.8% is from natural causes (a gain of 1,253,108 people) and 25.2% is from migration (a loss of 421,899 people).
As of 2024, 2,349,032 residents or 20% of the population were not native-born in Belgium, compared to 94,556 people or 1.8% in the Central African Republic.
Biggest cities by population
Compare countries by 7 more topics
Population differences between Belgium and the Central African Republic
|
Belgium
|
CAR
|
|
|---|---|---|
| Life expectancy | 82.6 years | 58.2 years |
| Average age | 42.7 years | 19.8 years |
| Median age | 42.9 years | 15.5 years |
| Male:Female ratio | 49.3:50.7 | 48.1:51.9 |
| Fertility rate | 1.44 births per woman | 5.95 births per woman |
| Population density | 1,016 ppl/mi² | 23.7 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/belgium/central-african-republic | CC BY
Help us show the world through your eyes
Share a photo of your city and help others discover what it looks like to live there. Your contribution makes our data come alive.
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)
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.