Residential delivery area · Washington
ZIP Code 99350: Prosser, WA
ZIP code 99350 uses the postal name Prosser, Washington and lies mostly in Benton County (87% of its land) with the rest in Klickitat County (Census 2020 ZIP-county file). About 15,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $81,014 (Census Bureau, ACS 2020-2024). By Census place, under 1% of its land lies in Prosser; more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Prosser · its only residential ZIP
- County
- Benton County (87%); Klickitat County (13%)
- Census places
- Prosser
- Metro area
- Kennewick-Richland, WA
- House district
- WA-4 119th Congress
- State
- Washington
- Time zone
- Pacific
- Land area
- 600.1 sq mi · 25 people per sq mi
Where is ZIP code 99350?
99350 centers on 46.142°, -119.737° and covers 600.1 square miles of land plus 1.7 of water. It borders 9 ZIP codes: 98930, 99345, 98935, 99320, 99346, 99338, 99322, 98944, 97818.
The map draws ZIP code areas only. For the streets inside 99350, 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 99350 compare with the rest of Benton County?
| Measure | 99350 | In Benton County | In WA |
|---|---|---|---|
| People (ACS 2020-2024) | 14,837 | 9th of 12 | 205th of 605 |
| Median household income | $81k | 7th of 10 | 241st of 363 |
| Median home value | $339k | 7th of 10 | 329th of 392 |
Its median household income is higher than in 63% of U.S. residential ZIP codes, and it is denser than 30% 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 99350?
The 2020 Census counted 13,240 people in 99350; the ACS, which samples households over 2020-2024, estimates 14,837. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 14,837
- 2020 Census count
- 13,240
- Households
- 4,676
- Median age
- 32.9
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 99350?
Of the 14,837 people the ACS estimates in 99350, 30.2% are under 18 and 13.5% are 65 or older. The largest group by race and Hispanic origin is Hispanic or Latino (49.7%), then White (not Hispanic) (46.2%).
- Under 1830.2%
- 18 to 6456.3%
- 65 and older13.5%
- Hispanic or Latino49.7%
- White, not Hispanic46.2%
- Other or two or more2.1%
- Asian, not Hispanic1.6%
- Black, not Hispanic0.4%
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 99350 earn?
Median household income is $81,014 (ACS 2020-2024), the 7th highest of the 10 ranked ZIP codes in Benton County.
- Median household income
- $81,014±$12,818
- Income per person
- $29,262
- Below the poverty line
- 12.4%
- Unemployed (of the labor force)
- 8.2%
- Adults 25+ with a bachelor's degree
- 21.5%
- Adjusted gross income per tax return, 2022
- $75,2876,010 returns; wages 68% 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 99350?
FHFA's house price index for 99350, built from repeat sales and appraisals of the same homes, rose 115% from 2015 to 2025 and rose 49% from 2020 to 2025, and moved +6.9% in 2025.
- Median home value (owners' estimate)
- $338,500
- Median gross rent
- $983
- Homes owned by their occupants
- 63.7%
- Housing units
- 5,059
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 99350?
266 business establishments had a location in this ZIP code in 2023, 28 more than in 2018; the most are in accommodation and food services (ZIP Code Business Patterns).
- Accommodation and food services34
- Retail trade32
- Other services (except public administration)29
- Manufacturing28
- Construction27
- Health care and social assistance26
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 99350?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 98930 | Grandview | 15,730 | $65k | 11.5 mi |
| 99345 | Paterson | 162 | $103k | 15.0 mi |
| 98935 | Mabton | 4,289 | $61k | 16.1 mi |
| 99320 | Benton City | 9,879 | $90k | 16.7 mi |
| 99346 | Plymouth | 198 | $51k | 22.2 mi |
| 99338 | Kennewick | 20,633 | $111k | 22.3 mi |
| 99322 | Bickleton | 412 | – | 24.2 mi |
| 98944 | Sunnyside | 22,817 | $64k | 25.4 mi |
| 97818 | Boardman, OR | 5,610 | $62k | 26.2 mi |
| 97844 | Irrigon, OR | 3,701 | $76k | 20.0 mi (near) |
| 99353 | West Richland | 19,251 | $122k | 20.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.