Town of Old Lyme, Lower Connecticut River Valley Planning Region, Connecticut
The Town of Old Lyme is a town in Lower Connecticut River Valley Planning Region, Connecticut. About 7,679 people live there (2020–2024 estimate). It covers 23 sq mi (59.6 km²) of land and uses Eastern Time. It has its own local government.
- Population, 2020–2024 estimate
- 7,679 ± 18
- Planning region
- Lower Connecticut River Valley Planning Region
- School district
- Regional School District 18
- Land area
- 23 sq mi (59.6 km²)
- Type
- TownIts own local government
- Time zone
- Eastern TimeUTC-05:00 in January; UTC-04:00 in July
- Median household income
- $131,899 ± $11,250
- Median home value
- $484,200 ± $21,146
- Water area
- 5.81 sq mi (15 km²)
- State
- Connecticut
- Census code (GEOID)
- 0913057040
- Coordinates (central point)
- 41.312320, -72.305742
These coordinates mark a central point for the area, not a street address. Population, income and home value: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 20, 2026.
Bordering areas, nearest first
- Town of Old Saybrook4.2 mi west
- Town of East Lyme, Southeastern Connecticut Planning Region5.0 mi northeast
- Town of Lyme6.1 mi north
These towns, townships, cities and boroughs share a boundary with the Town of Old Lyme. Distances are straight lines between central points, not driving distances.
Other towns in Lower Connecticut River Valley Planning Region, largest first
- Town of Middletown47,958 people
- Town of Cromwell14,334 people
- Town of Clinton13,377 people
- Town of East Hampton12,925 people
- Town of Old Saybrook10,575 people
- Town of Portland9,434 people
- Town of East Haddam8,969 people
- Town of Haddam8,644 people
- Town of Durham7,208 people
- Town of Westbrook6,856 people
- Town of Essex6,794 people
- Town of Killingworth6,240 people
All 16
- Town of Deep River4,458 people
- Town of Middlefield4,243 people
- Town of Chester3,825 people
- Town of Lyme2,303 people
People counts are American Community Survey 2020–2024 5-year estimates. See Lower Connecticut River Valley Planning Region for its cities, ZIP Code areas and county seat.
Sunrise and sunset in the Town of Old Lyme
- Longest day
- 15 hours 9 minutes around June 21
- Shortest day
- 9 hours 11 minutes around December 21
- Earliest sunrise
- 5:15 AM around June 14
- Latest sunrise
- 7:26 AM the day before clocks go back in November
- Earliest sunset
- 4:19 PM around December 8
- Latest sunset
- 8:26 PM around June 27
Clocks go forward an hour on the second Sunday in March and back on the first Sunday in November, so sunrise and sunset jump an hour later in March and an hour earlier in November.
| Day | Sunrise | Sunset | Daylight |
|---|---|---|---|
| Jan 15 | 7:12 AM | 4:44 PM | 9 h 32 min |
| Feb 15 | 6:44 AM | 5:22 PM | 10 h 38 min |
| Mar 15 | 7:01 AM | 6:55 PM | 11 h 54 min |
| Apr 15 | 6:09 AM | 7:29 PM | 13 h 20 min |
| May 15 | 5:30 AM | 8:00 PM | 14 h 30 min |
| Jun 15 | 5:15 AM | 8:24 PM | 15 h 9 min |
| Jul 15 | 5:28 AM | 8:21 PM | 14 h 53 min |
| Aug 15 | 5:58 AM | 7:48 PM | 13 h 50 min |
| Sep 15 | 6:29 AM | 6:58 PM | 12 h 29 min |
| Oct 15 | 7:00 AM | 6:08 PM | 11 h 8 min |
| Nov 15 | 6:37 AM | 4:29 PM | 9 h 52 min |
| Dec 15 | 7:07 AM | 4:20 PM | 9 h 13 min |
Approximate times for a flat horizon at the central point; the days move by a day or so from year to year. Hills and weather can change what you see.
Before using this answer on a form
A town line is not always the line on your mail: a mailing address can name another town or post office, and school districts, ZIP Codes and tax districts follow their own lines. For taxes, voting or permits, check the full address with Lower Connecticut River Valley Planning Region or the local office.
Find the township or town where you are now or find your county.