| Place Name | Hadlyme |
| Place Type | Unincorporated |
| ZIP Code(s) | 06439 |
| County | New London County |
| Area Code(s) | 860,959 |
| Timezone | Eastern Standard Time (EST) |
| Population () | |
| Metro/Micro Stats Area | Norwich-New London, CT |
| US Congressional District(s) | Connecticut 2nd |
| State House Districts | 23 |
| State Senate Districts | 33 |