| Place Name | Cornwallville |
| Place Type | Unincorporated |
| ZIP Code(s) | 12418 |
| County | Greene County |
| Area Code(s) | 518,838 |
| Timezone | Eastern Standard Time (EST) |
| Population () | |
| US Congressional District(s) | New York 19th |
| State Assembly Districts | 102 |
| State Senate Districts | 41 |