Zip Code 06475 — Old Saybrook, CT
06475 is a ZIP Code associated with Old Saybrook, CT, located within Lower Connecticut River Valley. 06475 ranks #5 out of 26 ZIP codes in Lower Connecticut River Valley County by population (and #120 out of 288 in CT). The area supports an estimated population of 10,575 residents across Data Pending housing units, with a population density of 271.1 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (41.301740, -72.385690)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 06475 |
| Primary City | Old Saybrook |
| State / Province | CT |
| County | Lower Connecticut River Valley |
| Total Population | 10,575 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 271.1 people/sq mi |
| Timezone | America/New_York |
How 06475 Compares
| Metric | ZIP 06475 | Lower Connecticut River Valley County | CT State Average |
|---|
| Population | 10,575 | 175,346 (Total) | 3,624,508 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 271.1 /sq mi | -- | -- |
| County Pop Rank | #5 of 26 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →