ZIP code · Pasco · Washington · United States

ZIP code 99301 — Pasco

ZIP code 99301 serves Pasco, Washington.

Postal code
99301
Single source Value from one source, not cross-checked.
City
Pasco
County
Franklin FIPS 53021
State
Washington
Country
United States
Coordinates
46.2492, -119.1044 — precision precise (locality)
View on OpenStreetMap
Population
86,467 (ZCTA, ACS 5-year)
Population density
178 / sq mi
Land area
486.3 sq mi (1,259.5 km²) (ZCTA, ACS 5-year)
Median household income
$82,517
Per-capita income
$33,368
Median age
30.5
Households
26,437
Housing units
27,700
Median home value
$353,300
Median gross rent
$1,195 / month
Congressional districts
WA-5 (also WA-4) (119th Congress)
USDA hardiness zone
7a (0 to 5 °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
509
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 Jul (avg high 93°F), coldest Dec (avg low 27°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F414959677783939181665041
Avg low °F282833384653575648383227
Precip in1.00.60.70.70.70.60.10.30.30.70.91.0

NOAA 1991–2020 climate normals from the nearest station: PASCO TRI CITIES AP (1.4 mi) · NOAA NCEI

Places in ZIP 99301

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