The latest officially reported population of Uganda was 50,015,092 in 2024 vs 21,314,956 people in Zambia in 2024. In 2026, based on the adjusted UN estimation, the current Uganda's population is 53,170,946 people compared to 22,697,916 in Zambia.
Population statistics:
- Uganda's population is 2.34 times bigger than Zambia's.
- Uganda is ranked the 30th most populous country in the world, while Zambia is the 62nd.
- The countries together account for 0.92% of the world: 0.64% for Uganda vs 0.27% for Zambia.
- For the last 10 years, Uganda has had an average growth rate of +3.21% per year vs +3% in Zambia.
- Since 2006, the population of Uganda has increased from 28.8M people to 53.2M (84.7% growth), while Zambia has grown from 12.1M to 22.7M (87.1% growth).
Uganda vs Zambia: population by year and forecast
| Year | Population | |
|---|---|---|
Uganda
|
Zambia
|
|
| 2100 | 122,497,526 | 65,217,429 |
| 2099 | 122,436,109 | 64,871,545 |
| 2098 | 122,364,302 | 64,515,891 |
| 2097 | 122,266,255 | 64,148,736 |
| 2096 | 122,146,810 | 63,777,313 |
| 2095 | 121,976,411 | 63,393,169 |
| 2094 | 121,799,752 | 62,992,652 |
| 2093 | 121,584,860 | 62,590,327 |
| 2092 | 121,336,796 | 62,175,930 |
| 2091 | 121,070,447 | 61,750,591 |
| 2090 | 120,767,412 | 61,321,399 |
| 2089 | 120,427,771 | 60,880,148 |
| 2088 | 120,064,594 | 60,434,676 |
| 2087 | 119,668,549 | 59,970,107 |
| 2086 | 119,256,686 | 59,499,234 |
| 2085 | 118,815,763 | 59,023,040 |
| 2084 | 118,339,179 | 58,535,857 |
| 2083 | 117,821,938 | 58,040,512 |
| 2082 | 117,274,958 | 57,538,672 |
| 2081 | 116,707,394 | 57,027,491 |
| 2080 | 116,096,095 | 56,506,421 |
| 2079 | 115,474,153 | 55,983,242 |
| 2078 | 114,805,376 | 55,449,777 |
| 2077 | 114,118,687 | 54,906,771 |
| 2076 | 113,390,189 | 54,361,075 |
| 2075 | 112,637,851 | 53,806,856 |
| 2074 | 111,863,410 | 53,246,777 |
| 2073 | 111,070,771 | 52,677,348 |
| 2072 | 110,240,940 | 52,101,139 |
| 2071 | 109,392,890 | 51,519,691 |
| 2070 | 108,505,633 | 50,931,614 |
| 2069 | 107,607,659 | 50,334,700 |
| 2068 | 106,677,578 | 49,737,479 |
| 2067 | 105,722,829 | 49,135,488 |
| 2066 | 104,739,111 | 48,530,443 |
| 2065 | 103,737,893 | 47,918,592 |
| 2064 | 102,701,560 | 47,299,740 |
| 2063 | 101,646,533 | 46,677,439 |
| 2062 | 100,561,859 | 46,048,819 |
| 2061 | 99,450,764 | 45,416,657 |
| 2060 | 98,334,788 | 44,777,347 |
| 2059 | 97,187,498 | 44,137,306 |
| 2058 | 96,014,439 | 43,494,451 |
| 2057 | 94,821,765 | 42,851,923 |
| 2056 | 93,613,209 | 42,206,898 |
| 2055 | 92,385,049 | 41,558,284 |
| 2054 | 91,132,827 | 40,906,492 |
| 2053 | 89,857,705 | 40,255,629 |
| 2052 | 88,568,311 | 39,603,888 |
| 2051 | 87,270,603 | 38,949,958 |
| 2050 | 85,957,376 | 38,294,607 |
| 2049 | 84,632,277 | 37,634,194 |
| 2048 | 83,284,965 | 36,971,309 |
| 2047 | 81,928,165 | 36,309,749 |
| 2046 | 80,569,225 | 35,645,868 |
| 2045 | 79,208,662 | 34,981,812 |
| 2044 | 77,834,944 | 34,316,981 |
| 2043 | 76,453,982 | 33,652,420 |
| 2042 | 75,075,287 | 32,990,657 |
| 2041 | 73,701,695 | 32,329,447 |
| 2040 | 72,333,375 | 31,664,262 |
| 2039 | 70,963,211 | 31,001,305 |
| 2038 | 69,580,447 | 30,335,662 |
| 2037 | 68,186,136 | 29,668,561 |
| 2036 | 66,804,746 | 29,000,264 |
| 2035 | 65,411,934 | 28,333,498 |
| 2034 | 64,023,352 | 27,671,195 |
| 2033 | 62,634,483 | 27,011,974 |
| 2032 | 61,235,174 | 26,356,580 |
| 2031 | 59,825,075 | 25,702,812 |
| 2030 | 58,415,479 | 25,055,216 |
| 2029 | 57,006,283 | 24,414,405 |
| 2028 | 55,596,520 | 23,780,809 |
| 2027 | 54,191,271 | 23,151,479 |
| 2026 | 52,792,624 | 22,529,742 |
| 2025 | 51,400,003 | 21,918,187 |
| 2024 | 50,015,092 | 21,314,956 |
| 2023 | 48,656,601 | 20,723,965 |
| 2022 | 47,312,719 | 20,152,938 |
| 2021 | 45,910,930 | 19,603,607 |
| 2020 | 44,457,152 | 19,059,395 |
| 2019 | 42,999,637 | 18,513,839 |
| 2018 | 41,565,831 | 17,973,569 |
| 2017 | 40,177,388 | 17,441,320 |
| 2016 | 38,799,152 | 16,914,423 |
| 2015 | 37,531,446 | 16,399,089 |
| 2014 | 36,395,539 | 15,895,315 |
| 2013 | 35,337,042 | 15,398,997 |
| 2012 | 34,337,438 | 14,913,629 |
| 2011 | 33,354,543 | 14,437,796 |
| 2010 | 32,390,802 | 13,965,594 |
| 2009 | 31,451,151 | 13,490,389 |
| 2008 | 30,539,553 | 13,021,324 |
| 2007 | 29,653,430 | 12,565,085 |
| 2006 | 28,794,003 | 12,129,553 |
| 2005 | 27,963,289 | 11,718,819 |
| 2004 | 27,154,515 | 11,338,198 |
| 2003 | 26,352,124 | 10,983,595 |
| 2002 | 25,532,870 | 10,647,949 |
| 2001 | 24,745,676 | 10,325,185 |
| 2000 | 24,000,150 | 10,017,631 |
| 1999 | 23,257,281 | 9,740,005 |
| 1998 | 22,515,806 | 9,482,408 |
| 1997 | 21,856,046 | 9,237,063 |
| 1996 | 21,231,550 | 9,004,053 |
| 1995 | 20,665,667 | 8,785,763 |
| 1994 | 20,108,801 | 8,576,269 |
| 1993 | 19,445,161 | 8,373,921 |
| 1992 | 18,785,032 | 8,176,680 |
| 1991 | 18,155,901 | 7,981,650 |
| 1990 | 17,569,897 | 7,786,169 |
| 1989 | 17,010,698 | 7,589,216 |
| 1988 | 16,470,483 | 7,391,440 |
| 1987 | 15,954,170 | 7,191,282 |
| 1986 | 15,467,579 | 6,986,471 |
| 1985 | 15,023,681 | 6,780,953 |
| 1984 | 14,607,677 | 6,580,490 |
| 1983 | 14,221,881 | 6,381,038 |
| 1982 | 13,873,631 | 6,178,637 |
| 1981 | 13,556,452 | 5,983,289 |
| 1980 | 13,275,741 | 5,802,833 |
| 1979 | 13,002,163 | 5,631,728 |
| 1978 | 12,692,113 | 5,465,374 |
| 1977 | 12,359,669 | 5,302,480 |
| 1976 | 12,037,294 | 5,143,842 |
| 1975 | 11,725,240 | 4,990,086 |
| 1974 | 11,424,846 | 4,842,746 |
| 1973 | 11,144,236 | 4,702,693 |
| 1972 | 10,885,796 | 4,569,309 |
| 1971 | 10,618,206 | 4,442,525 |
| 1970 | 10,321,603 | 4,321,718 |
| 1969 | 10,014,858 | 4,197,116 |
| 1968 | 9,708,632 | 4,065,593 |
| 1967 | 9,408,924 | 3,936,343 |
| 1966 | 9,122,864 | 3,812,003 |
| 1965 | 8,849,203 | 3,692,086 |
| 1964 | 8,586,363 | 3,577,017 |
| 1963 | 8,333,663 | 3,465,907 |
| 1962 | 8,092,231 | 3,358,099 |
| 1961 | 7,862,217 | 3,254,086 |
| 1960 | 7,640,973 | 3,153,729 |
Data sources: United Nations | World Population Prospects (2025–2100, retrieved 2026-03-10); World Bank | Health (1960–2024, retrieved 2026-04-06).
GeoRank.org/population/uganda/zambia | CC BY 
From 2006 to 2016, the population of Uganda increased by 10,005,149 people (a 34.7% growth), while Zambia gained 4,784,870 people (a 39.4% growth).
For the next 10 years, from 2016 to 2026, Uganda gained 14,371,794 people (a 37% growth), while Zambia's population increased by 5,783,493 people (a 34.2% growth).
Uganda was ranked 38th most populous country in 2006 and is 30th in 2026. Zambia was ranked 71st in 2006 and ranked 62nd now.
The UN's World Population Prospects forecasts that in 24 years (in 2050) Uganda's population will grow by 61.7% to 85,957,376 people with a rank change from 30th to 20th. The population of Zambia will increase by 68.7% to 38,294,607 people and rank change from 62nd to 54th.
Uganda is projected to reach its peak in 2100 at 122M people compared to the peak of 65.2M people in 2100 for Zambia.
Population growth rate by year
| Year | Growth rate | |
|---|---|---|
|
Uganda
|
Zambia
|
|
| 2100 | 0.05% | 0.53% |
| 2099 | 0.06% | 0.55% |
| 2098 | 0.08% | 0.57% |
| 2097 | 0.1% | 0.58% |
| 2096 | 0.14% | 0.61% |
| 2095 | 0.15% | 0.64% |
| 2094 | 0.18% | 0.64% |
| 2093 | 0.2% | 0.67% |
| 2092 | 0.22% | 0.69% |
| 2091 | 0.25% | 0.7% |
| 2090 | 0.28% | 0.72% |
| 2089 | 0.3% | 0.74% |
| 2088 | 0.33% | 0.77% |
| 2087 | 0.35% | 0.79% |
| 2086 | 0.37% | 0.81% |
| 2085 | 0.4% | 0.83% |
| 2084 | 0.44% | 0.85% |
| 2083 | 0.47% | 0.87% |
| 2082 | 0.49% | 0.9% |
| 2081 | 0.53% | 0.92% |
| 2080 | 0.54% | 0.93% |
| 2079 | 0.58% | 0.96% |
| 2078 | 0.6% | 0.99% |
| 2077 | 0.64% | 1% |
| 2076 | 0.67% | 1.03% |
| 2075 | 0.69% | 1.05% |
| 2074 | 0.71% | 1.08% |
| 2073 | 0.75% | 1.11% |
| 2072 | 0.78% | 1.13% |
| 2071 | 0.82% | 1.15% |
| 2070 | 0.83% | 1.19% |
| 2069 | 0.87% | 1.2% |
| 2068 | 0.9% | 1.23% |
| 2067 | 0.94% | 1.25% |
| 2066 | 0.97% | 1.28% |
| 2065 | 1.01% | 1.31% |
| 2064 | 1.04% | 1.33% |
| 2063 | 1.08% | 1.37% |
| 2062 | 1.12% | 1.39% |
| 2061 | 1.13% | 1.43% |
| 2060 | 1.18% | 1.45% |
| 2059 | 1.22% | 1.48% |
| 2058 | 1.26% | 1.5% |
| 2057 | 1.29% | 1.53% |
| 2056 | 1.33% | 1.56% |
| 2055 | 1.37% | 1.59% |
| 2054 | 1.42% | 1.62% |
| 2053 | 1.46% | 1.65% |
| 2052 | 1.49% | 1.68% |
| 2051 | 1.53% | 1.71% |
| 2050 | 1.57% | 1.75% |
| 2049 | 1.62% | 1.79% |
| 2048 | 1.66% | 1.82% |
| 2047 | 1.69% | 1.86% |
| 2046 | 1.72% | 1.9% |
| 2045 | 1.76% | 1.94% |
| 2044 | 1.81% | 1.97% |
| 2043 | 1.84% | 2.01% |
| 2042 | 1.86% | 2.05% |
| 2041 | 1.89% | 2.1% |
| 2040 | 1.93% | 2.14% |
| 2039 | 1.99% | 2.19% |
| 2038 | 2.04% | 2.25% |
| 2037 | 2.07% | 2.3% |
| 2036 | 2.13% | 2.35% |
| 2035 | 2.17% | 2.39% |
| 2034 | 2.22% | 2.44% |
| 2033 | 2.29% | 2.49% |
| 2032 | 2.36% | 2.54% |
| 2031 | 2.41% | 2.58% |
| 2030 | 2.47% | 2.62% |
| 2029 | 2.54% | 2.66% |
| 2028 | 2.59% | 2.72% |
| 2027 | 2.65% | 2.76% |
| 2026 | 2.71% | 2.79% |
| 2025 | 2.77% | 2.83% |
| 2024 | 2.79% | 2.85% |
| 2023 | 2.84% | 2.83% |
| 2022 | 3.05% | 2.8% |
| 2021 | 3.27% | 2.86% |
| 2020 | 3.39% | 2.95% |
| 2019 | 3.45% | 3.01% |
| 2018 | 3.46% | 3.05% |
| 2017 | 3.55% | 3.12% |
| 2016 | 3.38% | 3.14% |
| 2015 | 3.12% | 3.17% |
| 2014 | 3% | 3.22% |
| 2013 | 2.91% | 3.25% |
| 2012 | 2.95% | 3.3% |
| 2011 | 2.98% | 3.38% |
| 2010 | 2.99% | 3.52% |
| 2009 | 2.98% | 3.6% |
| 2008 | 2.99% | 3.63% |
| 2007 | 2.98% | 3.59% |
| 2006 | 2.97% | 3.5% |
| 2005 | 2.98% | 3.36% |
| 2004 | 3.04% | 3.23% |
| 2003 | 3.21% | 3.15% |
| 2002 | 3.18% | 3.13% |
| 2001 | 3.11% | 3.07% |
| 2000 | 3.19% | 2.85% |
| 1999 | 3.29% | 2.72% |
| 1998 | 3.02% | 2.66% |
| 1997 | 2.94% | 2.59% |
| 1996 | 2.74% | 2.48% |
| 1995 | 2.77% | 2.44% |
| 1994 | 3.41% | 2.42% |
| 1993 | 3.51% | 2.41% |
| 1992 | 3.47% | 2.44% |
| 1991 | 3.34% | 2.51% |
| 1990 | 3.29% | 2.6% |
| 1989 | 3.28% | 2.68% |
| 1988 | 3.24% | 2.78% |
| 1987 | 3.15% | 2.93% |
| 1986 | 2.95% | 3.03% |
| 1985 | 2.85% | 3.05% |
| 1984 | 2.71% | 3.13% |
| 1983 | 2.51% | 3.28% |
| 1982 | 2.34% | 3.26% |
| 1981 | 2.11% | 3.11% |
| 1980 | 2.1% | 3.04% |
| 1979 | 2.44% | 3.04% |
| 1978 | 2.69% | 3.07% |
| 1977 | 2.68% | 3.08% |
| 1976 | 2.66% | 3.08% |
| 1975 | 2.63% | 3.04% |
| 1974 | 2.52% | 2.98% |
| 1973 | 2.37% | 2.92% |
| 1972 | 2.52% | 2.85% |
| 1971 | 2.87% | 2.8% |
| 1970 | 3.06% | 2.97% |
| 1969 | 3.15% | 3.24% |
| 1968 | 3.19% | 3.28% |
| 1967 | 3.14% | 3.26% |
| 1966 | 3.09% | 3.25% |
| 1965 | 3.06% | 3.22% |
| 1964 | 3.03% | 3.21% |
| 1963 | 2.98% | 3.21% |
| 1962 | 2.93% | 3.2% |
| 1961 | 2.9% | 3.18% |
Data sources: United Nations | World Population Prospects (2025–2100, retrieved 2026-03-10); World Bank | Health (1961–2024, retrieved 2026-04-06).
GeoRank.org/population/uganda/zambia | CC BY
In 2024, the population of Uganda grew by 2.79%, while Zambia's population grew by 2.85%.
Live population counters
|
Uganda
|
Zambia
|
|
|---|---|---|
| Current population |
53170946
|
22697916
|
| Population rank | 30/197 | 62/197 |
| Percent of world population | 0.64% | 0.27% |
| One net population change |
23.2 seconds
|
53.4 seconds
|
| One birth every |
18.4 seconds
|
46 seconds
|
| One death every |
2.23 minutes
|
4.87 minutes
|
| Daily growth/decline | +3,722 | +1,619 |
| Annual growth/decline | +1,358,491 | +590,991 |
| Annual growth/decline rate | +2.79% | +2.85% |
| Population growth rate rank | 22/197 | 21/197 |
| One migration net change every |
4.43 minutes
|
1.34 hours
|
| Annual migration change | -119,059 | +6,562 |
| Net migration rank | 183/196 | 47/196 |
| Foreign-born residents | 2,057,759 | 249,205 |
| Foreign-born residents rank | 37/195 | 105/195 |
| Foreign-born share of population | 4.1% | 1.2% |
| Foreign-born share rank | 106/195 | 150/195 |
Natural population change vs migration
| Year | Population change | |||
|---|---|---|---|---|
|
Uganda
|
Zambia
|
|||
| Natural | Migration | Natural | Migration | |
| 2025 | - | -119,059 | - | 6,562 |
| 2024 | - | -117,924 | - | 7,381 |
| 2023 | 1,477,166 | -126,181 | 577,660 | 9,521 |
| 2022 | 1,455,576 | -118,843 | 563,456 | -8,566 |
| 2021 | 1,423,377 | 43,464 | 535,629 | 8,143 |
| 2020 | 1,397,288 | 43,464 | 536,484 | 8,156 |
| 2019 | 1,367,044 | 107,210 | 528,089 | 18,385 |
| 2018 | 1,332,600 | 60,724 | 515,644 | 18,431 |
| 2017 | 1,290,658 | 92,879 | 504,630 | 25,789 |
| 2016 | 1,249,565 | 123,379 | 497,521 | 25,860 |
| 2015 | 1,224,839 | -62,366 | 491,021 | 16,261 |
| 2014 | 1,201,599 | -92,273 | 483,663 | 16,574 |
| 2013 | 1,184,250 | -176,579 | 476,846 | 15,542 |
| 2012 | 1,167,473 | -175,936 | 469,406 | 8,958 |
| 2011 | 1,147,263 | -173,005 | 459,743 | 13,569 |
| 2010 | 1,121,564 | -168,322 | 448,337 | 22,761 |
| 2009 | 1,090,600 | -164,553 | 434,458 | 44,867 |
| 2008 | 1,055,935 | -158,790 | 419,560 | 39,249 |
| 2007 | 1,029,893 | -154,773 | 403,729 | 49,945 |
| 2006 | 999,958 | -156,232 | 387,891 | 29,517 |
| 2005 | 969,096 | -151,386 | 368,756 | 35,316 |
| 2004 | 938,623 | -138,770 | 349,352 | 7,819 |
| 2003 | 901,374 | -96,429 | 331,189 | 20,845 |
| 2002 | 868,756 | -35,149 | 316,041 | 3,206 |
| 2001 | 836,751 | -95,956 | 302,682 | 23,582 |
| 2000 | 803,069 | -52,824 | 293,186 | -4,338 |
| 1999 | 775,166 | -39,695 | 283,297 | -16,888 |
| 1998 | 741,175 | 6,277 | 275,568 | -26,796 |
| 1997 | 727,523 | -155,461 | 268,198 | -26,276 |
| 1996 | 699,707 | -22,795 | 262,468 | -38,358 |
| 1995 | 697,218 | -242,378 | 257,897 | -45,423 |
| 1994 | 675,092 | -16,198 | 252,023 | -45,504 |
| 1993 | 650,032 | 18,349 | 245,917 | -47,739 |
| 1992 | 627,139 | 24,723 | 239,953 | -43,656 |
| 1991 | 602,740 | 3,643 | 237,957 | -44,203 |
| 1990 | 587,291 | -21,688 | 235,835 | -38,619 |
| 1989 | 565,367 | -12,576 | 233,429 | -36,736 |
| 1988 | 547,759 | -20,113 | 230,118 | -31,270 |
| 1987 | 527,397 | -22,415 | 227,813 | -26,338 |
| 1986 | 487,693 | -19,485 | 224,768 | -16,610 |
| 1985 | 462,534 | -42,942 | 221,351 | -18,474 |
| 1984 | 421,241 | -8,818 | 216,695 | -18,652 |
| 1983 | 404,940 | -45,776 | 212,712 | -11,849 |
| 1982 | 390,820 | -53,497 | 207,621 | -3,676 |
| 1981 | 380,028 | -83,010 | 202,822 | -16,072 |
| 1980 | 370,287 | -105,900 | 198,817 | -24,664 |
| 1979 | 381,626 | -98,863 | 197,578 | -29,515 |
| 1978 | 371,930 | -34,606 | 194,933 | -30,284 |
| 1977 | 365,216 | -37,671 | 191,557 | -30,423 |
| 1976 | 359,458 | -42,259 | 186,762 | -30,612 |
| 1975 | 354,278 | -47,359 | 182,258 | -30,886 |
| 1974 | 345,773 | -51,910 | 174,484 | -31,178 |
| 1973 | 340,780 | -73,439 | 168,258 | -31,472 |
| 1972 | 335,935 | -86,409 | 161,648 | -31,672 |
| 1971 | 328,294 | -42,642 | 155,249 | -31,651 |
| 1970 | 333,202 | -25,646 | 149,380 | -31,370 |
| 1969 | 320,486 | -14,548 | 142,660 | -11,469 |
| 1968 | 309,725 | -3,214 | 137,315 | -5,447 |
| 1967 | 296,692 | -3,773 | 131,938 | -5,298 |
| 1966 | 282,225 | -3,021 | 127,164 | -5,129 |
| 1965 | 271,830 | -3,716 | 122,814 | -5,023 |
| 1964 | 260,733 | -3,169 | 117,197 | -4,851 |
| 1963 | 250,885 | -3,058 | 114,555 | -4,676 |
| 1962 | 241,513 | -6,470 | 110,173 | -4,428 |
| 1961 | 232,894 | -7,893 | 106,318 | -4,043 |
| 1960 | 225,080 | -7,586 | 102,335 | -3,898 |
Data sources: World Bank | Health (1960–2025, retrieved 2026-04-06).
GeoRank.org/population/uganda/zambia | CC BY
Over the last 10 years, 99.5% of the population change in Uganda is from natural causes (a gain of 13,419,712 people) and 0.53% is from migration (a gain of 71,457 people). In Zambia 97.4% is from natural causes (a gain of 5,233,797 people) and 2.58% is from migration (a gain of 138,554 people).
As of 2024, 2,057,759 residents or 4.1% of the population were not native-born in Uganda, compared to 249,205 people or 1.2% in Zambia.
Biggest cities by population
Compare countries by 7 more topics
Population differences between Uganda and Zambia
|
Uganda
|
Zambia
|
|
|---|---|---|
| Life expectancy | 68.9 years | 66.9 years |
| Average age | 21.6 years | 22.6 years |
| Median age | 17.8 years | 18.8 years |
| Male:Female ratio | 49.6:50.4 | 49.5:50.5 |
| Fertility rate | 4.28 births per woman | 4.1 births per woman |
| Population density | 682 ppl/mi² | 78.5 ppl/mi² |
Population map with other countries
Data sources: World Bank | Health (1960–2024, retrieved 2026-04-06); United Nations | World Population Prospects (1960–2026, retrieved 2026-03-10); U.S. Census Bureau (1960–2025, retrieved 2026-02-08); Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-02-20).
GeoRank.org/population/uganda/zambia | 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 2026-04-06)
- United Nations | World Population Prospects (1960–2100, retrieved 2026-03-10)
- U.S. Census Bureau (1960–2025, retrieved 2026-02-08)
- Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-02-20)
- Wikidata (2026, retrieved 2026-02-08)
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.