Residential delivery area · Washington
ZIP Code 99338: Kennewick, WA
ZIP code 99338 uses the postal name Kennewick, Washington and lies entirely in Benton County (Census 2020 ZIP-county file). About 21,000 people live there (Census Bureau, ACS 2020-2024), the least populous of Kennewick's 3 residential ZIP codes. Median household income is $111,042 (Census Bureau, ACS 2020-2024). By Census place, 16% of its land lies in Kennewick, and 1% in smaller places; 83% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Kennewick · 3 residential ZIPs
- County
- Benton County
- Census places
- Kennewick
- Metro area
- Kennewick-Richland, WA
- House district
- WA-4 119th Congress
- State
- Washington
- Time zone
- Pacific
- Land area
- 35.5 sq mi · 582 people per sq mi
Where is ZIP code 99338?
99338 centers on 46.174°, -119.274° and covers 35.5 square miles of land. It borders 6 ZIP codes: 99352, 99336, 99346, 99337, 99320, 99350.
The map draws ZIP code areas only. For the streets inside 99338, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 99338 compare with the rest of Kennewick?
| Measure | 99338 | In Kennewick | In Benton County | In WA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 20,633 | 3rd of 3 | 6th of 12 | 176th of 605 |
| Median household income | $111k | 1st of 3 | 2nd of 10 | 94th of 363 |
| Median home value | $552k | 1st of 3 | 1st of 10 | 162nd of 392 |
Its median household income is higher than in 87% of U.S. residential ZIP codes, and it is denser than 73% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 99338?
The 2020 Census counted 19,117 people in 99338; the ACS, which samples households over 2020-2024, estimates 20,633. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 20,633
- 2020 Census count
- 19,117
- Households
- 6,937
- Median age
- 37.6
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 99338?
Of the 20,633 people the ACS estimates in 99338, 29.7% are under 18 and 16.3% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (71.1%), then Hispanic or Latino (17.3%).
- Under 1829.7%
- 18 to 6454.0%
- 65 and older16.3%
- White, not Hispanic71.1%
- Hispanic or Latino17.3%
- Other or two or more5.2%
- Black, not Hispanic3.8%
- Asian, not Hispanic2.6%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 99338 earn?
Median household income is $111,042 (ACS 2020-2024), the 2nd highest of the 10 ranked ZIP codes in Benton County.
- Median household income
- $111,042
- Income per person
- $49,238
- Below the poverty line
- 8.5%
- Unemployed (of the labor force)
- 4.4%
- Adults 25+ with a bachelor's degree
- 39.3%
- Adjusted gross income per tax return, 2022
- $129,4709,210 returns; wages 61% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 99338?
FHFA's house price index for 99338, built from repeat sales and appraisals of the same homes, rose 102% from 2015 to 2025 and rose 45% from 2020 to 2025, and moved +2.1% in 2025.
- Median home value (owners' estimate)
- $551,500
- Median gross rent
- $1,486
- Homes owned by their occupants
- 81.9%
- Housing units
- 7,192
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 99338?
346 business establishments had a location in this ZIP code in 2023, 63 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction79
- Professional, scientific, and technical services47
- Health care and social assistance47
- Real estate and rental and leasing43
- Accommodation and food services23
- Wholesale trade15
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 99338?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 99352 | Richland | 37,430 | $100k | 5.1 mi |
| 99336 | Kennewick | 50,735 | $63k | 5.5 mi |
| 99346 | Plymouth | 198 | $51k | 10.0 mi |
| 99337 | Kennewick | 33,287 | $99k | 11.9 mi |
| 99320 | Benton City | 9,879 | $90k | 15.2 mi |
| 99350 | Prosser | 14,837 | $81k | 22.3 mi |
| 99354 | Richland | 25,559 | $92k | 11.0 mi (near) |
| 99353 | West Richland | 19,251 | $122k | 11.1 mi (near) |
| 97882 | Umatilla, OR | 7,976 | $69k | 18.8 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.