ZIP code · Skagway · Alaska · United States

ZIP code 99840 — Skagway

ZIP code 99840 serves Skagway, Alaska.

Postal code
99840
Single source Value from one source, not cross-checked.
City
Skagway
County
Skagway FIPS 02230
State
Alaska
Country
United States
Coordinates
59.4685, -135.3018 — precision estimated (postal-area centroid)
View on OpenStreetMap
Population
1,308 (ZCTA, ACS 5-year)
Population density
3 / sq mi
Land area
433.9 sq mi (1,123.9 km²) (ZCTA, ACS 5-year)
Median household income
$78,594
Per-capita income
$53,798
Median age
42.5
Households
451
Housing units
656
Median home value
$430,000
Median gross rent
$1,228 / month
Congressional district
AK At-large (119th Congress)
USDA hardiness zone
5a (-20 to -15 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/Juneau (UTC−9 / UTC−8 DST)
Area code
907
Telephone 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.

Nearby localities

Climate — monthly normals

Warmest month Jul (avg high 67°F), coldest Jan (avg low 20°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F293338506166676557473732
Avg low °F202225324048515044362724
Precip in2.62.02.01.71.11.41.62.64.54.43.44.0

NOAA 1991–2020 climate normals from the nearest station: SKAGWAY (1.1 mi) · NOAA NCEI

Places in ZIP 99840

Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology

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