Postal reference / United States
99643Old Harbor, Alaska
ZIP code 99643 is a United States postal code for Old Harbor, Alaska. Its county association is Kodiak Island County. The map reference point is at 57.2028, -153.3039.
- State / territory
- Alaska
- Recorded place name
- Old Harbor
- County association
- Kodiak Island
- Estimated coordinate
- 57.2028, -153.3039
View on OpenStreetMap - ZIP prefix
- 996 · 89 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
- 15.926 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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Browse the other 272 ZIP codes recorded for Alaska, sorted by code with place and county.
Alaska directoryNearby ZIP code reference points
| ZIP code | Place | State | County association | Miles |
|---|---|---|---|---|
| 99615 | Kodiak | AK | Kodiak Island | 27.8 |
| 99624 | Larsen Bay | AK | Kodiak Island | 34.3 |
| 99550 | Port Lions | AK | Kodiak Island | 48.5 |
| 99608 | Karluk | AK | Kodiak Island | 49.8 |
| 99619 | Kodiak | AK | Kodiak Island | 52.5 |
| 99697 | Kodiak | AK | Kodiak Island | 52.5 |
| 99644 | Ouzinkie | AK | Kodiak Island | 58.0 |
| 99663 | Seldovia | AK | Kenai Peninsula | 165.8 |
Straight-line distance between reference points. Nearby points do not prove that ZIP areas touch.
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