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Worldwide, attention-deficit hyperactivity disorder (ADHD) affects about 2.2% of people overall by 2017. This rate fluctuates between .1-8.1%. In Asia, Europe, North and South America, and the Middle East, the range is from .6-7.3%.
Not all countries have published data with ADHD for children younger than six years old. Some places do have records concerning this, however. The percentages equal 1.9% for Norway, 1.8% for Germany and 5.4% for Spain.
The World Health Organization (WHO), also surveyed 20 lower-middle to upper income countries. This revealed the U.S. as having the highest ADHD rate at 8.1% in children and adolescents. The three lowest are Iraq at .1%, Poland at .3% and Romania at .4%. Data from this study comes from as late as 2017.
People Ages 18-44
Another study, called the European ADORE study, took place over a period of 24 months. It includes research pulled from 10 EU countries ages 6-18 years. Out of 1478 children studied, boys with ADHD totaled 1222, which make up 84.3% of this group, and girls 231, which equals 15.7%.
Gender ratios indicated by countries included in the ADORE study measured 1:3 in females and 1:16 in males. Data reveals more diagnoses of ADHD in adult males than adult females in many locations. However, the ratio of males to females with ADHD has decreased with age.
In Australia, ADHD rates by country in Australia totaled 3.72% in 2019, which is up from 3.68% in 2018. This list shows some of the highest population percentages of countries with ADHD in 2019:
Three more studies have shown decreases in ADHD prevalence. This drop includes 10-20 year olds, 8-15 year olds, and 6-14 year olds.
Country | Prevalent Cases (per 100k pop) | Prevalent Cases (Lower Value) (per 100k pop) | Prevalent Cases (Upper Value) (per 100k pop) |
---|---|---|---|
Belize | 3,452 | 2,511 | 4,682 |
Haiti | 3,422 | 2,478 | 4,645 |
Guyana | 3,229 | 2,362 | 4,371 |
Dominican Republic | 3,167 | 2,323 | 4,267 |
Jamaica | 3,054 | 2,248 | 4,118 |
Suriname | 3,021 | 2,217 | 4,042 |
Grenada | 3,005 | 2,206 | 4,042 |
Bahamas | 2,960 | 2,183 | 3,959 |
Saint Vincent and the Grenadines | 2,901 | 2,135 | 3,878 |
Dominica | 2,888 | 2,123 | 3,864 |
Antigua and Barbuda | 2,816 | 2,079 | 3,766 |
Saint Kitts and Nevis | 2,814 | 2,082 | 3,742 |
Saint Lucia | 2,794 | 2,068 | 3,731 |
Australia | 2,716 | 2,099 | 3,414 |
Trinidad and Tobago | 2,686 | 1,982 | 3,566 |
Venezuela | 2,599 | 1,922 | 3,510 |
Iran | 2,572 | 1,879 | 3,424 |
Barbados | 2,486 | 1,842 | 3,308 |
Cuba | 2,426 | 1,794 | 3,218 |
United States Virgin Islands | 2,403 | 1,775 | 3,179 |
Puerto Rico | 2,385 | 1,768 | 3,168 |
Bolivia | 2,230 | 1,615 | 2,997 |
Ecuador | 2,217 | 1,607 | 2,970 |
Bermuda | 2,156 | 1,602 | 2,818 |
Peru | 2,139 | 1,552 | 2,862 |
Paraguay | 2,074 | 1,489 | 2,753 |
New Zealand | 2,064 | 1,490 | 2,777 |
Spain | 1,897 | 1,401 | 2,474 |
Brazil | 1,825 | 1,329 | 2,511 |
Greenland | 1,796 | 1,303 | 2,412 |
Guatemala | 1,771 | 1,263 | 2,420 |
Honduras | 1,768 | 1,258 | 2,414 |
Nicaragua | 1,713 | 1,223 | 2,332 |
United States | 1,676 | 1,206 | 2,264 |
El Salvador | 1,595 | 1,141 | 2,173 |
Thailand | 1,582 | 1,152 | 2,076 |
Panama | 1,561 | 1,117 | 2,122 |
China | 1,546 | 1,164 | 1,986 |
Canada | 1,531 | 1,120 | 2,063 |
Israel | 1,505 | 1,087 | 2,063 |
Costa Rica | 1,469 | 1,061 | 1,991 |
Brunei | 1,451 | 1,047 | 2,017 |
Turkey | 1,417 | 1,040 | 1,858 |
Ireland | 1,378 | 979 | 1,874 |
Samoa | 1,343 | 936 | 1,874 |
Nauru | 1,338 | 935 | 1,869 |
Solomon Islands | 1,324 | 922 | 1,854 |
Vanuatu | 1,309 | 913 | 1,835 |
Papua New Guinea | 1,287 | 901 | 1,794 |
Micronesia | 1,274 | 897 | 1,766 |
Kiribati | 1,265 | 887 | 1,764 |
Tonga | 1,261 | 880 | 1,761 |
Marshall Islands | 1,257 | 885 | 1,747 |
Norway | 1,236 | 905 | 1,646 |
Iceland | 1,235 | 890 | 1,646 |
American Samoa | 1,228 | 864 | 1,703 |
Tuvalu | 1,227 | 865 | 1,698 |
Colombia | 1,221 | 904 | 1,609 |
Afghanistan | 1,213 | 867 | 1,672 |
Argentina | 1,203 | 872 | 1,607 |
Iraq | 1,191 | 867 | 1,578 |
Tajikistan | 1,181 | 843 | 1,594 |
Sudan | 1,179 | 846 | 1,614 |
Palestine | 1,175 | 844 | 1,607 |
Finland | 1,173 | 867 | 1,559 |
Fiji | 1,163 | 825 | 1,613 |
Tokelau | 1,156 | 811 | 1,607 |
Austria | 1,147 | 844 | 1,544 |
Jordan | 1,143 | 821 | 1,560 |
Qatar | 1,142 | 808 | 1,550 |
North Korea | 1,137 | 805 | 1,510 |
Uzbekistan | 1,133 | 812 | 1,524 |
Mexico | 1,128 | 815 | 1,530 |
Kyrgyzstan | 1,120 | 802 | 1,508 |
Chile | 1,120 | 809 | 1,509 |
Oman | 1,116 | 798 | 1,511 |
Timor Leste | 1,107 | 781 | 1,520 |
Egypt | 1,104 | 794 | 1,509 |
Switzerland | 1,103 | 809 | 1,467 |
France | 1,102 | 782 | 1,470 |
Uruguay | 1,101 | 797 | 1,486 |
Turkmenistan | 1,096 | 788 | 1,470 |
Guam | 1,085 | 771 | 1,500 |
Netherlands | 1,073 | 775 | 1,405 |
Syria | 1,071 | 771 | 1,451 |
Niue | 1,047 | 744 | 1,443 |
Mongolia | 1,041 | 749 | 1,391 |
Philippines | 1,038 | 747 | 1,437 |
Singapore | 1,035 | 755 | 1,397 |
Libya | 1,021 | 732 | 1,372 |
Laos | 1,018 | 724 | 1,388 |
Morocco | 1,008 | 724 | 1,365 |
Azerbaijan | 1,007 | 724 | 1,335 |
Kazakhstan | 1,004 | 722 | 1,340 |
Northern Mariana Islands | 995 | 711 | 1,360 |
Cook Islands | 992 | 705 | 1,364 |
Algeria | 989 | 708 | 1,340 |
Cyprus | 988 | 725 | 1,327 |
Palau | 988 | 708 | 1,343 |
Cambodia | 985 | 704 | 1,344 |
Luxembourg | 980 | 719 | 1,315 |
South Korea | 978 | 723 | 1,294 |
Indonesia | 966 | 697 | 1,336 |
San Marino | 962 | 703 | 1,300 |
Saudi Arabia | 954 | 685 | 1,286 |
Belgium | 953 | 696 | 1,283 |
Lebanon | 949 | 679 | 1,286 |
Kuwait | 945 | 684 | 1,270 |
Bahrain | 943 | 681 | 1,249 |
Maldives | 940 | 666 | 1,279 |
Myanmar | 936 | 671 | 1,274 |
United Kingdom | 929 | 671 | 1,272 |
Andorra | 920 | 673 | 1,226 |
Tunisia | 919 | 659 | 1,238 |
Japan | 906 | 652 | 1,206 |
Armenia | 890 | 640 | 1,173 |
Yemen | 888 | 629 | 1,245 |
Sweden | 888 | 649 | 1,167 |
Malta | 880 | 645 | 1,176 |
Albania | 875 | 631 | 1,154 |
Greece | 865 | 634 | 1,149 |
Portugal | 862 | 633 | 1,149 |
Vietnam | 862 | 620 | 1,167 |
Montenegro | 860 | 620 | 1,128 |
Sri Lanka | 855 | 617 | 1,157 |
Bangladesh | 847 | 607 | 1,169 |
Georgia | 843 | 607 | 1,108 |
North Macedonia | 843 | 606 | 1,099 |
Seychelles | 833 | 601 | 1,126 |
Serbia | 824 | 594 | 1,080 |
Russia | 824 | 594 | 1,103 |
Moldova | 822 | 591 | 1,073 |
Monaco | 800 | 588 | 1,065 |
Pakistan | 798 | 548 | 1,111 |
Ukraine | 792 | 572 | 1,056 |
Equatorial Guinea | 791 | 548 | 1,090 |
Poland | 788 | 567 | 1,050 |
Belarus | 787 | 565 | 1,024 |
Slovakia | 787 | 566 | 1,022 |
Bosnia and Herzegovina | 783 | 563 | 1,018 |
Nigeria | 776 | 537 | 1,081 |
Romania | 774 | 557 | 1,008 |
Mauritius | 770 | 556 | 1,040 |
Estonia | 769 | 553 | 1,003 |
Niger | 754 | 508 | 1,073 |
Croatia | 753 | 541 | 979 |
Czech Republic | 750 | 539 | 976 |
Hungary | 749 | 538 | 972 |
Chad | 748 | 505 | 1,064 |
Lithuania | 744 | 535 | 967 |
Ethiopia | 742 | 507 | 1,040 |
Cameroon | 742 | 504 | 1,050 |
Mali | 741 | 502 | 1,050 |
Latvia | 739 | 531 | 961 |
Malawi | 738 | 511 | 1,019 |
Gambia | 738 | 502 | 1,042 |
Uganda | 737 | 509 | 1,019 |
Guinea Bissau | 735 | 500 | 1,039 |
Senegal | 735 | 499 | 1,040 |
Slovenia | 733 | 528 | 954 |
Mauritania | 732 | 497 | 1,036 |
Benin | 732 | 496 | 1,036 |
Liberia | 731 | 501 | 1,033 |
Somalia | 730 | 505 | 1,006 |
South Sudan | 728 | 502 | 1,011 |
Guinea | 727 | 492 | 1,028 |
Burkina Faso | 726 | 492 | 1,027 |
Kenya | 724 | 499 | 1,014 |
Bulgaria | 724 | 521 | 941 |
Sierra Leone | 723 | 494 | 1,022 |
Sao Tome and Principe | 722 | 495 | 1,021 |
Ivory Coast | 722 | 494 | 1,020 |
Italy | 722 | 518 | 977 |
Togo | 716 | 490 | 1,011 |
Mozambique | 715 | 494 | 988 |
DR Congo | 713 | 497 | 981 |
Zambia | 712 | 497 | 981 |
Eritrea | 711 | 498 | 978 |
Nepal | 709 | 495 | 976 |
Angola | 708 | 490 | 977 |
Madagascar | 704 | 493 | 969 |
Burundi | 698 | 485 | 960 |
Ghana | 696 | 479 | 984 |
Central African Republic | 695 | 485 | 956 |
Rwanda | 693 | 485 | 952 |
Tanzania | 691 | 482 | 951 |
Zimbabwe | 690 | 482 | 949 |
Bhutan | 687 | 483 | 926 |
Denmark | 683 | 490 | 897 |
Eswatini | 683 | 478 | 937 |
Republic of the Congo | 663 | 465 | 908 |
Taiwan | 661 | 483 | 879 |
Lesotho | 658 | 464 | 901 |
Djibouti | 654 | 461 | 893 |
Namibia | 652 | 458 | 896 |
Comoros | 646 | 455 | 885 |
Gabon | 639 | 450 | 879 |
Cape Verde | 634 | 440 | 897 |
Botswana | 628 | 444 | 856 |
India | 620 | 433 | 853 |
South Africa | 595 | 414 | 824 |
Malaysia | 432 | 306 | 592 |
Germany | 411 | 291 | 548 |
United Arab Emirates | 388 | 265 | 536 |
Australia has the highest percentage of its total population with ADHD, 3.72%. The United States has the world's highest percentage of children and teens with ADHD, 8.1%.
Among children and adolescents, the United States has the highest rate of ADHD globally, 8.1%.