| Country | PHITS users |
|---|
| Algeria | 6 |
| Argentina | 129 |
| Australia | 13 |
| Austria | 19 |
| Bangladesh | 16 |
| Belarus | 1 |
| Belgium | 53 |
| Bolivia | 3 |
| Botswana | 4 |
| Brazil | 25 |
| Cameroon | 43 |
| Canada | 15 |
| China | 165 |
| Colombia | 3 |
| Croatia | 4 |
| Cuba | 2 |
| Czech Republic | 25 |
| Denmark | 4 |
| Dominica | 1 |
| Ecuador | 2 |
| Egypt | 12 |
| Ethiopia | 1 |
| Finland | 3 |
| France | 148 |
| Germany | 82 |
| Ghana | 2 |
| Greece | 4 |
| Hong Kong | 1 |
| Hungary | 2 |
| India | 30 |
| Indonesia | 410 |
| Italy | 84 |
| Japan | 2873 |
| Jordan | 3 |
| Kazakhstan | 5 |
| Kenya | 2 |
| South Korea | 249 |
| Kuwait | 1 |
| Latvia | 1 |
| Malaysia | 113 |
| Mexico | 15 |
| Mongolia | 11 |
| Morocco | 31 |
| Myanmar | 90 |
| Nepal | 6 |
| Netherlands | 7 |
| Nigeria | 13 |
| Norway | 4 |
| Pakistan | 1 |
| Paraguay | 1 |
| Peru | 3 |
| Philippines | 211 |
| Poland | 34 |
| Portugal | 5 |
| Romania | 7 |
| Russia | 18 |
| Saudi Arabia | 38 |
| Serbia | 4 |
| Singapore | 5 |
| Slovenia | 2 |
| South Africa | 4 |
| Spain | 114 |
| Sweden | 51 |
| Switzerland | 23 |
| Taiwan | 50 |
| Tanzania | 1 |
| Thailand | 71 |
| Tunisia | 1 |
| Turkey | 41 |
| Uganda | 1 |
| Ukraine | 4 |
| United Arab Emirates | 3 |
| United Kingdom | 32 |
| United States | 333 |
| Vietnam | 95 |
| Yemen | 1 |
| Total | 5890 |