IFSHA follows the region structure defined by the USEF. The table below lists the states contained in each region. Note that the Canadian provices bordering on the northern tier states are included in the region for the adjacent state.
| REGION | STATE | CONTIGUOUS REGION FOR CANADA |
|---|---|---|
| 1 | Connecticut, Massachusetts, Maine, New Hampshire, Rhode Island, Vermont | YES |
| 2 | New Jersey, New York, Pennsylvania | YES |
| 3 | Delaware, Washington DC, Maryland, North Carolina, Virginia, West Virginia | |
| 4 | Alabama, Florida, Georgia, Mississippi, South Carolina, Tennessee | |
| 5 | Illinois, Indiana, Kentucky, Michigan, Ohio | YES |
| 6 | Iowa, Minnesota, North Dakota, South Dakota, Wisconsin, Nebraska | YES |
| 7 | Arkansas, Kansas, Louisiana, Missouri, Oklahoma, Texas | |
| 8 | Arizona, Colorado, New Mexico, Utah | |
| 9 | Idaho, Montana, Oregon, Washington, Wyoming | YES |
| 10 | California, Nevada | |
| 11 | Hawaii | |
| 12 | Alaska |