Ohio
| Name | Contact | Phone | Website | |
| Margie Pfund Memorial Post Mark Museum and Library | Gary Hendren | Call 314.249.0731 | Website | |
| Ohio Postal History Society | Matthew Leibson | Call 216.308.0519 | Website | |
| Paper History, LLC | Matthew Leibson | Call 216.308.0519 | Website | |
| Reasoner Stamps | Mark Reasoner | Call 614.579.6526 | ||
| Srail Stamps | Ken Srail | Call 888.864.2483 | Website | |
| Stamp Collectors Club of Toledo | Charles Hablizel | Call 419.297.7604 | Website |
Please notify Steve Kennedy at skennedy at paphs.org of any errors or omissions.
