| Place Name | Old Lyme |
| Place Type | Town |
| ZIP Code(s) | 06371 |
| County | New London County |
| Area Code(s) | 860,959 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 7,582 |
| Majority Ethnicity | White 91.97% |
| Metro/Micro Stats Area | Norwich-New London, CT |
| US Congressional District(s) | Connecticut 2nd |
| State House Districts | 23 |
| State Senate Districts | 20 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 91.97% |
| African American | 0% |
| Hispanic | 0.17% |
| Asian | 2.09% |
| Native American | 0.08% |
| Hawaiin/Pacific Islander | 5.69% |