| canada | ontario | sistrurus catenatus | species | 12 | 2 |
| canada | ontario | sistrurus catenatus catenatus | subspecies | 75 | 0 |
| mexico | federal district | sistrurus ravus | species | 5 | 0 |
| united states | | sistrurus miliarius | species | 8 | 0 |
| united states | arizona | sistrurus catenatus edwardsi | subspecies | 19 | 0 |
| united states | colorado | sistrurus catenatus edwardsi | subspecies | 19 | 0 |
| united states | florida | sistrurus miliarius | species | 12 | 2 |
| united states | florida | sistrurus miliarius barbouri | subspecies | 56 | 2 |
| united states | georgia | sistrurus miliarius | species | 1 | 0 |
| united states | illinois | sistrurus catenatus | species | 0 | 2 |
| united states | illinois | sistrurus catenatus catenatus | subspecies | 37 | 1 |
| united states | iowa | sistrurus catenatus | species | 0 | 2 |
| united states | iowa | sistrurus catenatus tergeminus | subspecies | 0 | 1 |
| united states | kansas | sistrurus catenatus tergeminus | subspecies | 59 | 0 |
| united states | michigan | sistrurus catenatus | species | 0 | 2 |
| united states | michigan | sistrurus catenatus catenatus | subspecies | 19 | 0 |
| united states | mississippi | sistrurus catenatus | species | 0 | 1 |
| united states | mississippi | sistrurus catenatus tergeminus | subspecies | 0 | 1 |
| united states | missouri | sistrurus catenatus tergeminus | subspecies | 94 | 0 |
| united states | new mexico | sistrurus catenatus edwardsi | subspecies | 51 | 0 |
| united states | new york | sistrurus catenatus | species | 0 | 1 |
| united states | new york | sistrurus catenatus catenatus | subspecies | 19 | 0 |
| united states | north carolina | sistrurus miliarius miliarius | subspecies | 8 | 0 |
| united states | ohio | sistrurus catenatus | species | 0 | 1 |
| united states | ohio | sistrurus catenatus catenatus | subspecies | 18 | 0 |
| united states | oklahoma | sistrurus catenatus tergeminus | subspecies | 7 | 0 |
| united states | oklahoma | sistrurus miliarius streckeri | subspecies | 38 | 0 |
| united states | pennsylvania | sistrurus catenatus catenatus | subspecies | 19 | 0 |
| united states | south carolina | sistrurus miliarius miliarius | subspecies | 19 | 0 |
| united states | texas | sistrurus catenatus edwardsi | subspecies | 26 | 0 |
| united states | texas | sistrurus catenatus tergeminus | subspecies | 47 | 0 |
| united states | wisconsin | sistrurus catenatus catenatus | subspecies | 19 | 0 |