Postal reference / United States
11742Holtsville, New York
ZIP code 11742 is a United States postal code for Holtsville, New York. Its county association is Suffolk County. The map reference point is at 40.8105, -73.0416.
- State / territory
- New York
- Recorded place name
- Holtsville
- County association
- Suffolk
- Estimated coordinate
- 40.8105, -73.0416
View on OpenStreetMap - ZIP prefix
- 117 · 82 ZIP codes share it
- Data source
- GeoNames postal reference, snapshot September 26, 2026
GeoNames reference data. County associations may not include every intersecting county, place names are postal names rather than legal boundaries, and coordinates are approximate. This is not address validation.
Area
- Land area
- 5.149 sq mi (2023 Census Gazetteer)
Figures are for the ZIP Code Tabulation Area (ZCTA) that most closely matches this ZIP code, not an exact match to USPS delivery boundaries. Source: U.S. Census Bureau, 2023 Gazetteer + 2023 ACS 5-Year Estimates, retrieved 2026-09-27. How to read this data.
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New York directoryOther ZIP codes in Holtsville, NY
Holtsville has 3 ZIP codes in the reference dataset.
Nearby ZIP code reference points
| ZIP code | Place | State | County association | Miles |
|---|---|---|---|---|
| 00501 | Holtsville | NY | Suffolk | 0.4 |
| 00544 | Holtsville | NY | Suffolk | 0.4 |
| 11738 | Farmingville | NY | Suffolk | 1.8 |
| 11741 | Holbrook | NY | Suffolk | 1.9 |
| 11763 | Medford | NY | Suffolk | 3.0 |
| 11784 | Selden | NY | Suffolk | 4.1 |
| 11715 | Blue Point | NY | Suffolk | 4.2 |
| 11772 | Patchogue | NY | Suffolk | 4.5 |
Straight-line distance between reference points. Nearby points do not prove that ZIP areas touch.
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