ZIP code · Old Harbor · Alaska · United States
ZIP code 99643 — Old Harbor
ZIP code 99643 serves Old Harbor, Alaska.
- Postal code
- 99643Single source Value from one source, not cross-checked.
- City
- Old Harbor
- County
- Kodiak Island FIPS 02150
- State
- Alaska
- Country
- United States
- Coordinates
- 57.2028, -153.3039 — precision estimated (postal-area centroid)
View on OpenStreetMap - Population
- 186 (ZCTA, ACS 5-year)
- Population density
- 12 / sq mi
- Land area
- 15.9 sq mi (41.3 km²) (ZCTA, ACS 5-year)
- Median household income
- $31,250
- Per-capita income
- $19,207
- Median age
- 33
- Households
- 91
- Housing units
- 153
- Median home value
- $95,000
- Median gross rent
- $863 / month
- Congressional district
- AK At-large (119th Congress)
- USDA hardiness zone
- 7b (5 to 10 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Area code
- 907Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 99643 with another ZIP · ZIPs within 25 miles · distance from 99643
Nearby localities
Map of ZIP code 99643
Climate — monthly normals
Warmest month Aug (avg high 63°F), coldest Jan (avg low 26°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 36 | 38 | 39 | 45 | 52 | 57 | 62 | 63 | 57 | 48 | 41 | 37 |
| Avg low °F | 26 | 27 | 28 | 34 | 40 | 46 | 51 | 50 | 44 | 36 | 30 | 27 |
| Precip in | 8.3 | 6.3 | 4.8 | 6.1 | 5.8 | 5.2 | 4.5 | 4.9 | 7.5 | 8.8 | 7.1 | 8.8 |
NOAA 1991–2020 climate normals from the nearest station: KODIAK AP (48.6 mi) · NOAA NCEI
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page