| argentina | buenos aires city | isospora canis | species | 0 | 1 |
| argentina | buenos aires province | isospora canis | species | 0 | 1 |
| australia | | isospora amphiboluri | species | 2 | 0 |
| australia | | isospora manorinae | species | 4 | 0 |
| australia | | isospora neochmiae | species | 4 | 0 |
| australia | | isospora sp. ry-2015a | species | 2 | 0 |
| australia | | isospora streperae | species | 3 | 0 |
| australia | south australia | isospora rivolta | species | 0 | 1 |
| australia | western australia | isospora anthochaerae | species | 0 | 3 |
| australia | western australia | isospora gryphoni | species | 0 | 2 |
| australia | western australia | isospora lesouefi | species | 0 | 1 |
| australia | western australia | isospora manorinae | species | 0 | 1 |
| australia | western australia | isospora neochmiae | species | 0 | 1 |
| australia | western australia | isospora streperae | species | 0 | 1 |
| brazil | | isospora sp. | species | 1 | 0 |
| brazil | | isospora sp. ry-2015a | species | 1 | 0 |
| canada | | isospora amphiboluri | species | 1 | 0 |
| canada | | isospora greineri | species | 1 | 0 |
| canada | | isospora rivolta | species | 2 | 0 |
| canada | | isospora sp. | species | 2 | 0 |
| canada | | isospora sp. jrb-2015 | species | 1 | 0 |
| canada | | isospora sp. jrb-2016 | species | 1 | 0 |
| canada | | isospora sp. mah-2013a | species | 2 | 0 |
| canada | | isospora sp. mah-2013b | species | 2 | 0 |
| canada | | isospora superbusi | species | 1 | 0 |
| canada | newfoundland and labrador | isospora canis | species | 0 | 1 |
| canada | ontario | isospora gryphoni | species | 0 | 1 |
| cape verde | brava municipality | isospora sp. jci-2015 | species | 5 | 0 |
| cape verde | maio municipality | isospora sp. jci-2015 | species | 113 | 0 |
| chile | | isospora sp. 1 jm-2013 | species | 3 | 0 |
| czech republic | | isospora sp. | species | 1 | 0 |
| czech republic | | isospora sp. ex apodemus flavicollis | species | 1 | 0 |
| czech republic | | isospora sp. ex talpa europaea | species | 3 | 0 |
| ecuador | galapagos province | isospora canis | species | 0 | 1 |
| egypt | | isospora sp. | species | 1 | 0 |
| guyana | | isospora sp. sg-2010a | species | 1 | 0 |
| iran | | isospora tristis | species | 1 | 0 |
| iran | fars province | isospora lunaris | species | 1 | 0 |
| iran | isfahan province | isospora rivolta | species | 0 | 1 |
| japan | | isospora lunaris | species | 1 | 0 |
| japan | tokyo prefecture | isospora sp. tokyo | species | 6 | 0 |
| morocco | | isospora fahdi | species | 1 | 0 |
| morocco | | isospora sp. jci-2015 | species | 1 | 0 |
| morocco | rabat-sale-zemmour-zaer | isospora canis | species | 0 | 1 |
| norway | | isospora sp. | species | 2 | 0 |
| peru | | isospora sp. sg-2010a | species | 1 | 0 |
| portugal | lisboa district | isospora rivolta | species | 0 | 1 |
| portugal | madeira autonomous region | isospora sp. jci-2015 | species | 1 | 0 |
| saudi arabia | eastern province region | isospora canis | species | 0 | 1 |
| saudi arabia | eastern province region | isospora rivolta | species | 0 | 1 |
| slovakia | | isospora sp. | species | 7 | 0 |
| south korea | seoul city | isospora rivolta | species | 1 | 0 |
| spain | | isospora amphiboluri | species | 1 | 0 |
| spain | | isospora gekkonis | species | 1 | 0 |
| spain | | isospora takydromi | species | 1 | 0 |
| spain | andalusia | isospora canis | species | 0 | 1 |
| spain | andalusia | isospora sp. jci-2015 | species | 1 | 0 |
| spain | canary islands | isospora sp. jci-2015 | species | 7 | 0 |
| spain | canary islands | isospora tarentolae | species | 1 | 0 |
| spain | melilla | isospora chafarinensis | species | 1 | 0 |
| spain | melilla | isospora wiegmanniana | species | 1 | 0 |
| spain | murcia | isospora canis | species | 0 | 1 |
| taiwan | | isospora canis | species | 0 | 1 |
| taiwan | | isospora rivolta | species | 0 | 1 |
| tunisia | | isospora abdallahi | species | 1 | 0 |
| united arab emirates | dubai | isospora orlovi | species | 0 | 1 |
| united arab emirates | dubai | isospora rivolta | species | 0 | 1 |
| united kingdom | | isospora sp. | species | 16 | 0 |
| united states | | isospora sp. | species | 166 | 0 |
| united states | california | isospora amphiboluri | species | 0 | 1 |
| united states | colorado | isospora rivolta | species | 0 | 1 |
| united states | illinois | isospora rivolta | species | 0 | 1 |
| united states | kansas | isospora rivolta | species | 1 | 0 |
| united states | louisiana | isospora rivolta | species | 0 | 1 |
| united states | ohio | isospora canis | species | 0 | 1 |
| yemen | hadramaut governorate | isospora sp. | species | 1 | 0 |