The latest officially reported population of Cameroon was 29,879,337 in 2025 vs 5,513,282 people in the Central African Republic in 2025. In 2026, based on the adjusted UN estimation, the current Cameroon's population is 31,045,453 people compared to 5,798,457 in the Central African Republic.
Population statistics:
- Cameroon's population is 5.35 times bigger than the Central African Republic's.
- Cameroon is ranked the 51st most populous country in the world, while the Central African Republic is the 117th.
- The countries together account for 0.44% of the world: 0.37% for Cameroon vs 0.07% for the Central African Republic.
- For the last 10 years, Cameroon has had an average growth rate of +2.8% per year vs +1.62% in the Central African Republic.
- Since 2006, the population of Cameroon has increased from 17.6M people to 31M (76.9% growth), while the Central African Republic has grown from 4.38M to 5.8M (32.5% growth).
Cameroon vs Central African Republic: population by year and forecast
| Year | Population | |
|---|---|---|
Cameroon
|
CAR
|
|
| 2100 | 89,761,493 | 19,061,127 |
| 2099 | 89,236,081 | 18,981,009 |
| 2098 | 88,700,571 | 18,896,319 |
| 2097 | 88,148,423 | 18,810,793 |
| 2096 | 87,584,533 | 18,719,993 |
| 2095 | 87,012,755 | 18,621,666 |
| 2094 | 86,422,461 | 18,521,650 |
| 2093 | 85,823,264 | 18,420,299 |
| 2092 | 85,216,516 | 18,311,751 |
| 2091 | 84,591,510 | 18,200,580 |
| 2090 | 83,955,258 | 18,083,097 |
| 2089 | 83,304,250 | 17,968,298 |
| 2088 | 82,644,527 | 17,844,377 |
| 2087 | 81,971,087 | 17,717,148 |
| 2086 | 81,292,292 | 17,581,447 |
| 2085 | 80,596,814 | 17,447,157 |
| 2084 | 79,893,144 | 17,306,435 |
| 2083 | 79,174,449 | 17,159,818 |
| 2082 | 78,447,054 | 17,010,036 |
| 2081 | 77,705,764 | 16,860,592 |
| 2080 | 76,946,674 | 16,704,486 |
| 2079 | 76,185,626 | 16,552,105 |
| 2078 | 75,414,998 | 16,392,201 |
| 2077 | 74,632,426 | 16,224,015 |
| 2076 | 73,846,385 | 16,051,483 |
| 2075 | 73,045,925 | 15,877,563 |
| 2074 | 72,232,083 | 15,706,759 |
| 2073 | 71,416,307 | 15,526,382 |
| 2072 | 70,587,575 | 15,346,626 |
| 2071 | 69,756,436 | 15,158,906 |
| 2070 | 68,920,850 | 14,964,276 |
| 2069 | 68,080,121 | 14,768,967 |
| 2068 | 67,236,365 | 14,572,130 |
| 2067 | 66,384,714 | 14,369,861 |
| 2066 | 65,524,711 | 14,167,129 |
| 2065 | 64,661,065 | 13,963,573 |
| 2064 | 63,793,364 | 13,758,257 |
| 2063 | 62,925,133 | 13,545,150 |
| 2062 | 62,051,886 | 13,332,625 |
| 2061 | 61,174,588 | 13,120,271 |
| 2060 | 60,289,485 | 12,903,195 |
| 2059 | 59,400,116 | 12,684,791 |
| 2058 | 58,506,347 | 12,464,271 |
| 2057 | 57,609,734 | 12,242,308 |
| 2056 | 56,718,154 | 12,020,446 |
| 2055 | 55,825,018 | 11,797,986 |
| 2054 | 54,922,920 | 11,575,058 |
| 2053 | 54,020,742 | 11,351,527 |
| 2052 | 53,110,977 | 11,128,939 |
| 2051 | 52,204,288 | 10,908,122 |
| 2050 | 51,302,617 | 10,686,324 |
| 2049 | 50,395,223 | 10,468,520 |
| 2048 | 49,490,600 | 10,249,810 |
| 2047 | 48,582,238 | 10,034,764 |
| 2046 | 47,678,096 | 9,819,986 |
| 2045 | 46,779,348 | 9,606,504 |
| 2044 | 45,880,138 | 9,394,614 |
| 2043 | 44,989,272 | 9,185,941 |
| 2042 | 44,093,888 | 8,980,018 |
| 2041 | 43,194,408 | 8,774,893 |
| 2040 | 42,307,249 | 8,567,893 |
| 2039 | 41,421,572 | 8,358,128 |
| 2038 | 40,545,218 | 8,149,514 |
| 2037 | 39,674,106 | 7,942,721 |
| 2036 | 38,807,341 | 7,734,436 |
| 2035 | 37,954,978 | 7,525,805 |
| 2034 | 37,107,744 | 7,314,741 |
| 2033 | 36,270,943 | 7,105,166 |
| 2032 | 35,438,930 | 6,897,152 |
| 2031 | 34,618,857 | 6,690,066 |
| 2030 | 33,804,320 | 6,486,667 |
| 2029 | 33,002,520 | 6,286,290 |
| 2028 | 32,206,806 | 6,085,426 |
| 2027 | 31,421,882 | 5,890,999 |
| 2026 | 30,647,877 | 5,700,718 |
| 2025 | 29,879,337 | 5,513,282 |
| 2024 | 29,123,744 | 5,330,690 |
| 2023 | 28,372,687 | 5,152,421 |
| 2022 | 27,632,771 | 5,098,039 |
| 2021 | 26,915,758 | 5,112,100 |
| 2020 | 26,210,558 | 5,026,628 |
| 2019 | 25,506,095 | 4,944,703 |
| 2018 | 24,806,383 | 4,878,657 |
| 2017 | 24,128,601 | 4,793,511 |
| 2016 | 23,454,161 | 4,713,663 |
| 2015 | 22,763,414 | 4,629,320 |
| 2014 | 22,059,893 | 4,623,182 |
| 2013 | 21,402,376 | 4,642,419 |
| 2012 | 20,809,529 | 4,610,848 |
| 2011 | 20,232,304 | 4,565,021 |
| 2010 | 19,668,066 | 4,492,995 |
| 2009 | 19,113,974 | 4,529,047 |
| 2008 | 18,574,056 | 4,558,984 |
| 2007 | 18,049,896 | 4,462,770 |
| 2006 | 17,550,407 | 4,377,579 |
| 2005 | 17,074,594 | 4,288,810 |
| 2004 | 16,610,487 | 4,192,826 |
| 2003 | 16,160,340 | 4,103,086 |
| 2002 | 15,725,528 | 4,006,077 |
| 2001 | 15,309,490 | 3,919,487 |
| 2000 | 14,912,631 | 3,833,416 |
| 1999 | 14,525,140 | 3,729,450 |
| 1998 | 14,144,860 | 3,628,827 |
| 1997 | 13,775,214 | 3,531,700 |
| 1996 | 13,414,757 | 3,435,965 |
| 1995 | 13,058,516 | 3,348,052 |
| 1994 | 12,704,903 | 3,257,954 |
| 1993 | 12,353,131 | 3,157,839 |
| 1992 | 12,006,353 | 3,058,831 |
| 1991 | 11,667,180 | 2,963,191 |
| 1990 | 11,331,821 | 2,871,910 |
| 1989 | 11,002,745 | 2,783,970 |
| 1988 | 10,684,968 | 2,713,965 |
| 1987 | 10,370,749 | 2,669,155 |
| 1986 | 10,060,342 | 2,634,258 |
| 1985 | 9,761,730 | 2,600,932 |
| 1984 | 9,475,078 | 2,568,610 |
| 1983 | 9,215,397 | 2,537,399 |
| 1982 | 9,028,678 | 2,507,375 |
| 1981 | 8,816,377 | 2,478,402 |
| 1980 | 8,512,219 | 2,450,535 |
| 1979 | 8,239,641 | 2,423,794 |
| 1978 | 8,011,921 | 2,397,961 |
| 1977 | 7,796,501 | 2,372,930 |
| 1976 | 7,597,962 | 2,348,566 |
| 1975 | 7,397,120 | 2,313,916 |
| 1974 | 7,193,583 | 2,269,338 |
| 1973 | 6,996,660 | 2,226,008 |
| 1972 | 6,806,872 | 2,183,769 |
| 1971 | 6,624,408 | 2,141,450 |
| 1970 | 6,449,793 | 2,097,505 |
| 1969 | 6,283,462 | 2,051,515 |
| 1968 | 6,125,863 | 2,005,100 |
| 1967 | 5,977,318 | 1,960,444 |
| 1966 | 5,837,295 | 1,918,082 |
| 1965 | 5,704,686 | 1,877,854 |
| 1964 | 5,578,257 | 1,839,583 |
| 1963 | 5,456,623 | 1,803,063 |
| 1962 | 5,338,620 | 1,768,115 |
| 1961 | 5,239,273 | 1,734,580 |
| 1960 | 5,159,057 | 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/cameroon/central-african-republic | CC BY 
From 2006 to 2016, the population of Cameroon increased by 5,903,754 people (a 33.6% growth), while the Central African Republic gained 336,084 people (a 7.68% growth).
For the next 10 years, from 2016 to 2026, Cameroon gained 7,591,292 people (a 32.4% growth), while the Central African Republic's population increased by 1,084,794 people (a 23% growth).
Cameroon was ranked 59th most populous country in 2006 and is 51st 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) Cameroon's population will grow by 65.3% to 51,302,617 people with a rank change from 51st to 41st. The population of the Central African Republic will increase by 84.3% to 10,686,324 people and rank change from 117th to 96th.
Cameroon is projected to reach its peak in 2100 at 89.8M people compared to the peak of 19.1M people in 2100 for the Central African Republic.
Population growth rate by year
| Year | Growth rate | |
|---|---|---|
|
Cameroon
|
CAR
|
|
| 2100 | 0.59% | 0.42% |
| 2099 | 0.6% | 0.45% |
| 2098 | 0.63% | 0.45% |
| 2097 | 0.64% | 0.49% |
| 2096 | 0.66% | 0.53% |
| 2095 | 0.68% | 0.54% |
| 2094 | 0.7% | 0.55% |
| 2093 | 0.71% | 0.59% |
| 2092 | 0.74% | 0.61% |
| 2091 | 0.76% | 0.65% |
| 2090 | 0.78% | 0.64% |
| 2089 | 0.8% | 0.69% |
| 2088 | 0.82% | 0.72% |
| 2087 | 0.84% | 0.77% |
| 2086 | 0.86% | 0.77% |
| 2085 | 0.88% | 0.81% |
| 2084 | 0.91% | 0.85% |
| 2083 | 0.93% | 0.88% |
| 2082 | 0.95% | 0.89% |
| 2081 | 0.99% | 0.93% |
| 2080 | 1% | 0.92% |
| 2079 | 1.02% | 0.98% |
| 2078 | 1.05% | 1.04% |
| 2077 | 1.06% | 1.07% |
| 2076 | 1.1% | 1.1% |
| 2075 | 1.13% | 1.09% |
| 2074 | 1.14% | 1.16% |
| 2073 | 1.17% | 1.17% |
| 2072 | 1.19% | 1.24% |
| 2071 | 1.21% | 1.3% |
| 2070 | 1.23% | 1.32% |
| 2069 | 1.25% | 1.35% |
| 2068 | 1.28% | 1.41% |
| 2067 | 1.31% | 1.43% |
| 2066 | 1.34% | 1.46% |
| 2065 | 1.36% | 1.49% |
| 2064 | 1.38% | 1.57% |
| 2063 | 1.41% | 1.59% |
| 2062 | 1.43% | 1.62% |
| 2061 | 1.47% | 1.68% |
| 2060 | 1.5% | 1.72% |
| 2059 | 1.53% | 1.77% |
| 2058 | 1.56% | 1.81% |
| 2057 | 1.57% | 1.85% |
| 2056 | 1.6% | 1.89% |
| 2055 | 1.64% | 1.93% |
| 2054 | 1.67% | 1.97% |
| 2053 | 1.71% | 2% |
| 2052 | 1.74% | 2.02% |
| 2051 | 1.76% | 2.08% |
| 2050 | 1.8% | 2.08% |
| 2049 | 1.83% | 2.13% |
| 2048 | 1.87% | 2.14% |
| 2047 | 1.9% | 2.19% |
| 2046 | 1.92% | 2.22% |
| 2045 | 1.96% | 2.26% |
| 2044 | 1.98% | 2.27% |
| 2043 | 2.03% | 2.29% |
| 2042 | 2.08% | 2.34% |
| 2041 | 2.1% | 2.42% |
| 2040 | 2.14% | 2.51% |
| 2039 | 2.16% | 2.56% |
| 2038 | 2.2% | 2.6% |
| 2037 | 2.23% | 2.69% |
| 2036 | 2.25% | 2.77% |
| 2035 | 2.28% | 2.89% |
| 2034 | 2.31% | 2.95% |
| 2033 | 2.35% | 3.02% |
| 2032 | 2.37% | 3.1% |
| 2031 | 2.41% | 3.14% |
| 2030 | 2.43% | 3.19% |
| 2029 | 2.47% | 3.3% |
| 2028 | 2.5% | 3.3% |
| 2027 | 2.53% | 3.34% |
| 2026 | 2.57% | 3.4% |
| 2025 | 2.59% | 3.43% |
| 2024 | 2.65% | 3.46% |
| 2023 | 2.68% | 1.07% |
| 2022 | 2.66% | -0.28% |
| 2021 | 2.69% | 1.7% |
| 2020 | 2.76% | 1.66% |
| 2019 | 2.82% | 1.35% |
| 2018 | 2.81% | 1.78% |
| 2017 | 2.88% | 1.69% |
| 2016 | 3.03% | 1.82% |
| 2015 | 3.19% | 0.13% |
| 2014 | 3.07% | -0.41% |
| 2013 | 2.85% | 0.68% |
| 2012 | 2.85% | 1% |
| 2011 | 2.87% | 1.6% |
| 2010 | 2.9% | -0.8% |
| 2009 | 2.91% | -0.66% |
| 2008 | 2.9% | 2.16% |
| 2007 | 2.85% | 1.95% |
| 2006 | 2.79% | 2.07% |
| 2005 | 2.79% | 2.29% |
| 2004 | 2.79% | 2.19% |
| 2003 | 2.77% | 2.42% |
| 2002 | 2.72% | 2.21% |
| 2001 | 2.66% | 2.25% |
| 2000 | 2.67% | 2.79% |
| 1999 | 2.69% | 2.77% |
| 1998 | 2.68% | 2.75% |
| 1997 | 2.69% | 2.79% |
| 1996 | 2.73% | 2.63% |
| 1995 | 2.78% | 2.77% |
| 1994 | 2.85% | 3.17% |
| 1993 | 2.89% | 3.24% |
| 1992 | 2.91% | 3.23% |
| 1991 | 2.96% | 3.18% |
| 1990 | 2.99% | 3.16% |
| 1989 | 2.97% | 2.58% |
| 1988 | 3.03% | 1.68% |
| 1987 | 3.09% | 1.32% |
| 1986 | 3.06% | 1.28% |
| 1985 | 3.03% | 1.26% |
| 1984 | 2.82% | 1.23% |
| 1983 | 2.07% | 1.2% |
| 1982 | 2.41% | 1.17% |
| 1981 | 3.57% | 1.14% |
| 1980 | 3.31% | 1.1% |
| 1979 | 2.84% | 1.08% |
| 1978 | 2.76% | 1.05% |
| 1977 | 2.61% | 1.04% |
| 1976 | 2.72% | 1.5% |
| 1975 | 2.83% | 1.96% |
| 1974 | 2.81% | 1.95% |
| 1973 | 2.79% | 1.93% |
| 1972 | 2.75% | 1.98% |
| 1971 | 2.71% | 2.1% |
| 1970 | 2.65% | 2.24% |
| 1969 | 2.57% | 2.31% |
| 1968 | 2.49% | 2.28% |
| 1967 | 2.4% | 2.21% |
| 1966 | 2.32% | 2.14% |
| 1965 | 2.27% | 2.08% |
| 1964 | 2.23% | 2.03% |
| 1963 | 2.21% | 1.98% |
| 1962 | 1.9% | 1.93% |
| 1961 | 1.55% | 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/cameroon/central-african-republic | CC BY
In 2025, the population of Cameroon grew by 2.59%, while the Central African Republic's population grew by 3.43%.
Live population counters
|
Cameroon
|
CAR
|
|
|---|---|---|
| Current population |
31045453
|
5798457
|
| Population rank | 51/197 | 117/197 |
| Percent of world population | 0.37% | 0.07% |
| One net population change |
41.9 seconds
|
2.89 minutes
|
| One birth every |
32.5 seconds
|
2.13 minutes
|
| One death every |
2.57 minutes
|
10.5 minutes
|
| Daily growth/decline | +2,070 | +500 |
| Annual growth/decline | +755,593 | +182,592 |
| Annual growth/decline rate | +2.59% | +3.43% |
| Population growth rate rank | 22/197 | 7/197 |
| One migration net change every |
34.3 minutes
|
35.9 minutes
|
| Annual migration change | -15,379 | -14,693 |
| Net migration rank | 146/196 | 143/196 |
| Foreign-born residents | 642,948 | 94,556 |
| Foreign-born residents rank | 74/195 | 132/195 |
| Foreign-born share of population | 2.2% | 1.8% |
| Foreign-born share rank | 130/195 | 135/195 |
Natural population change vs migration
| Year | Population change | |||
|---|---|---|---|---|
|
Cameroon
|
CAR
|
|||
| Natural | Migration | Natural | Migration | |
| 2025 | - | -15,379 | - | -14,693 |
| 2024 | 766,304 | -13,892 | 196,244 | -15,357 |
| 2023 | 754,486 | -4,798 | 190,325 | -14,682 |
| 2022 | 734,893 | -4,798 | -49,456 | -17,430 |
| 2021 | 713,806 | -9,888 | 124,408 | -85,646 |
| 2020 | 716,361 | -9,888 | 156,911 | -24,745 |
| 2019 | 714,681 | -12,255 | 68,523 | -36,849 |
| 2018 | 706,188 | -9,184 | 153,361 | -52,954 |
| 2017 | 696,496 | -37,912 | 128,461 | -58,584 |
| 2016 | 677,051 | 13,255 | 142,419 | -52,607 |
| 2015 | 649,190 | 42,008 | 141,912 | -63,045 |
| 2014 | 619,243 | 96,599 | 107,448 | -174,051 |
| 2013 | 606,072 | -6,900 | 140,489 | -112,382 |
| 2012 | 594,029 | -7,523 | 146,791 | -111,764 |
| 2011 | 580,607 | -12,669 | 142,913 | -86,281 |
| 2010 | 569,921 | -9,366 | 130,539 | -43,126 |
| 2009 | 557,841 | -10,203 | -130,613 | -28,899 |
| 2008 | 542,919 | -10,720 | 128,627 | -28,983 |
| 2007 | 526,949 | -10,807 | 123,137 | -30,352 |
| 2006 | 511,366 | -28,528 | 118,882 | -41,282 |
| 2005 | 496,547 | -27,775 | 113,534 | -13,604 |
| 2004 | 478,880 | -19,444 | 108,548 | -16,510 |
| 2003 | 459,422 | -18,568 | 105,540 | -18,097 |
| 2002 | 439,544 | -10,766 | 100,588 | 5,992 |
| 2001 | 422,511 | -19,203 | 99,598 | -33,006 |
| 2000 | 411,633 | -21,221 | 97,468 | 8,079 |
| 1999 | 401,969 | -17,398 | 96,108 | 6,284 |
| 1998 | 388,432 | -12,446 | 94,361 | 4,479 |
| 1997 | 377,138 | -13,842 | 93,378 | 2,034 |
| 1996 | 370,355 | -12,738 | 93,369 | 2,697 |
| 1995 | 367,532 | -12,661 | 92,748 | -12,986 |
| 1994 | 364,390 | -12,028 | 90,943 | 9,496 |
| 1993 | 360,785 | -9,601 | 89,873 | 9,930 |
| 1992 | 356,072 | -13,702 | 88,939 | 9,269 |
| 1991 | 350,493 | -14,520 | 88,688 | 4,381 |
| 1990 | 342,901 | -8,163 | 87,507 | 1,995 |
| 1989 | 334,649 | -11,244 | 85,969 | 409 |
| 1988 | 328,168 | -16,016 | 84,654 | -31,016 |
| 1987 | 320,134 | -3,829 | 83,408 | -47,428 |
| 1986 | 308,188 | -3,671 | 81,149 | -47,332 |
| 1985 | 296,317 | -3,604 | 79,266 | -46,427 |
| 1984 | 284,110 | -3,512 | 77,395 | -45,591 |
| 1983 | 276,112 | -37,346 | 75,399 | -44,780 |
| 1982 | 274,652 | -139,974 | 73,330 | -43,908 |
| 1981 | 262,076 | 27,845 | 71,391 | -42,872 |
| 1980 | 247,808 | 70,589 | 68,759 | -41,539 |
| 1979 | 238,875 | -12,108 | 66,104 | -39,850 |
| 1978 | 229,958 | -1,282 | 63,285 | -37,874 |
| 1977 | 222,785 | -20,622 | 60,436 | -35,782 |
| 1976 | 214,916 | -19,994 | 57,725 | -33,645 |
| 1975 | 206,986 | -237 | 55,106 | -9,895 |
| 1974 | 200,693 | -377 | 53,777 | -9,838 |
| 1973 | 193,997 | -466 | 52,525 | -9,800 |
| 1972 | 186,521 | -473 | 51,390 | -9,634 |
| 1971 | 179,317 | -439 | 50,142 | -7,259 |
| 1970 | 170,713 | -367 | 48,690 | -3,693 |
| 1969 | 162,603 | -286 | 47,066 | -80 |
| 1968 | 153,080 | -204 | 45,377 | 474 |
| 1967 | 144,370 | -148 | 42,979 | 474 |
| 1966 | 135,927 | -96 | 40,804 | 474 |
| 1965 | 129,428 | -39 | 38,710 | 474 |
| 1964 | 123,469 | 0 | 36,878 | 474 |
| 1963 | 119,784 | 0 | 35,218 | 474 |
| 1962 | 116,232 | 0 | 33,731 | 474 |
| 1961 | 82,471 | 0 | 32,383 | 474 |
| 1960 | 77,948 | 0 | 31,131 | 474 |
Data sources: World Bank | Health (1960–2025, retrieved 2026-07-08).
GeoRank.org/population/cameroon/central-african-republic | CC BY
Over the last 10 years, 99.3% of the population change in Cameroon is from natural causes (a gain of 7,129,456 people) and 0.66% is from migration (a loss of 47,352 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, 642,948 residents or 2.2% of the population were not native-born in Cameroon, 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 Cameroon and the Central African Republic
|
Cameroon
|
CAR
|
|
|---|---|---|
| Life expectancy | 64.5 years | 58.2 years |
| Average age | 23.3 years | 19.8 years |
| Median age | 19.1 years | 15.5 years |
| Male:Female ratio | 49.8:50.2 | 48.1:51.9 |
| Fertility rate | 4.26 births per woman | 5.95 births per woman |
| Population density | 167.9 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/cameroon/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.