ZIP code · Kennewick · Washington · United States
ZIP code 99338 — Kennewick
ZIP code 99338 serves Kennewick, Washington.
- Postal code
- 99338Single source Value from one source, not cross-checked.
- City
- Kennewick
- County
- Benton FIPS 53005
- State
- Washington
- Country
- United States
- Coordinates
- 46.1560, -119.2640 — precision precise (locality)
View on OpenStreetMap - Population
- 19,235 (ZCTA, ACS 5-year)
- Population density
- 543 / sq mi
- Land area
- 35.5 sq mi (91.8 km²) (ZCTA, ACS 5-year)
- Median household income
- $116,002
- Per-capita income
- $52,637
- Median age
- 39.2
- Households
- 6,637
- Housing units
- 6,909
- Median home value
- $526,700
- Median gross rent
- $1,474 / month
- Congressional district
- WA-4 (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.
- Time zone
- America/Los_Angeles (UTC−8 / UTC−7 DST)
- Area code
- 509Telephone 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 99338 with another ZIP · ZIPs within 25 miles · distance from 99338
Map of ZIP code 99338
Climate — monthly normals
Warmest month Jul (avg high 91°F), coldest Jan (avg low 29°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 42 | 48 | 58 | 66 | 75 | 82 | 91 | 90 | 81 | 66 | 51 | 42 |
| Avg low °F | 29 | 31 | 36 | 42 | 50 | 56 | 62 | 61 | 53 | 43 | 35 | 30 |
| Precip in | 1.1 | 0.8 | 0.7 | 0.6 | 0.8 | 0.6 | 0.2 | 0.2 | 0.3 | 0.7 | 0.9 | 1.1 |
NOAA 1991–2020 climate normals from the nearest station: KENNEWICK (8.7 mi) · NOAA NCEI
Places in ZIP 99338
- 10 schools
- 3 hospitals & clinics
- 2 doctors & dentists
- 1 supermarkets
- 18 restaurants & cafés
- 2 bars & pubs
- 18 parks
- 20 playgrounds
- 2 gyms & sports centres
- 1 libraries
- 5 places of worship
- 2 banks
- 5 gas stations
- 6 EV charging stations
- 3 police & fire stations
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