ZIP code · Long Beach · Washington · United States

ZIP code 98631 — Long Beach

ZIP code 98631 serves Long Beach, Washington.

Postal code
98631
Single source Value from one source, not cross-checked.
City
Long Beach
County
Pacific FIPS 53049
State
Washington
Country
United States
Coordinates
46.3774, -124.0470 — precision precise (locality)
View on OpenStreetMap
Population
3,468 (ZCTA, ACS 5-year)
Population density
153 / sq mi
Land area
22.7 sq mi (58.8 km²) (ZCTA, ACS 5-year)
Median household income
$59,511
Per-capita income
$48,475
Median age
56.7
Households
1,691
Housing units
3,143
Median home value
$338,300
Median gross rent
$838 / month
Congressional district
WA-3 (119th Congress)
USDA hardiness zone
9a (20 to 25 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/Los_Angeles (UTC−8 / UTC−7 DST)
Area code
360
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.

Climate — monthly normals

Warmest month Aug (avg high 67°F), coldest Feb (avg low 35°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F495052555962656766605348
Avg low °F363537404549525248423836
Precip in12.07.88.76.83.52.61.01.62.78.211.412.2

NOAA 1991–2020 climate normals from the nearest station: LONG BEACH EXP STN (0.8 mi) · NOAA NCEI

Places in ZIP 98631

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