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  3. ZIP Code 99350
Washington (WA)Benton CountyKennewick-Richland509

ZIP Code 99350 — Prosser, WA

Benton County * Kennewick-Richland metro

Compare

14.8K

Population

$81K

Median income

per household

$338.5K

Home value

12.4%

Poverty rate

What stands out

  • Median household income: $81K.
  • Median home value: $338.5K.
  • Poverty rate: 12.4%.

Categories vs U.S.

Economy

3 of 5 metrics better than U.S. benchmarks

Rental strain: 40.4% of renter households are rent-burdened (≥30% of income).

Median household income

$81K

U.S.

$81K

Per-capita income

$29.3K

U.S.

$45K

Median home value

$338.5K

U.S.

$333K

Housing stress

Rent-burdened renters (≥30%)

40.4%

U.S.

51.1%

Severely rent-burdened (≥50%)

22.1%

U.S.

25.9%

Affordability Ratios

Rent-to-Income

14.6%

Below 30% threshold

Home-Value-to-Income

4.2×

Upper end of typical range

Income distribution

Share of households by income bracket (ACS).

< $50k
29.9%
$50–100k
32.0%
$100–200k
31.6%
$200k+
6.5%

Health

3 of 6 available metrics better than U.S.

CDC PLACES modeled ZCTA-level estimates (adult prevalence).

Obesity

38.9%

U.S.

33.3%

Diabetes

12.5%

U.S.

12.0%

Current smoking

11.9%

U.S.

13.1%

Connectivity

2 of 3 metrics better than U.S.

Best available speed

1,000Mbps

Gigabit speeds reported

100+ Mbps coverage

97.3%

U.S.

85.3%

Gigabit ready

3.8%

U.S.

8.6%

5G available

97.0%

U.S.

77.4%

Learning

Education metrics come from ACS 5-year estimates for ZIP Code Tabulation Areas (ZCTAs).

Bachelor's degree+ (age 25+)

21.6%

U.S.

35.7%

ZIP-level estimates can have higher margins of error than county/state totals; treat small differences as noise.

School districts

Prosser School District

Map

ZIP 99350

Prosser, WA

Population

14.8K

Area

600.1 sq mi

Density

24.7/sq mi

Neighbors

978189893098935989449932099322993389934599346
More Details

Census Tracts

10 tracts overlap this ZIP. Hover over segments to explore.

37%
24%
19%
13%

Tract 116

37.3%

Tract 118.01

24%

Tract 118.02

19%

Tract 9501.01

12.6%

Tract 119

3.6%

Others (5)

3.7%

Total tracts: 10Coverage: 100.0%

Representation

U.S. House

ZIP codes can span multiple congressional districts. Overlap percentages are approximate by land area. Verify by address.

100%

WA-4

100%

Districts: 1Coverage: 100.0%

Data freshness

ACS 5-Year
2020–2024
CDC PLACES
2025
Broadband
2020-12
Mobile
2025-11-24
Page Updated
2026-02-23

Release schedule and upstream dates: Sources.

Data sources

US Census Bureau (ACS 5-year)HUD USPS ZIP crosswalkUS Census TIGER/Line (geometry inputs)US Census TIGER/Line (school districts)US Census Bureau (ZCTA-to-tract relationship, 2020)US Census Bureau (2020 ZCTA-to-congressional-district relationship file, CD119)CDC PLACES (ZCTA)FCC (Form 477 broadband)FCC (Mobile Broadband Data Collection)

Derived statistics

  • ZIP pages use Census ZIP Code Tabulation Areas (ZCTAs), not USPS delivery routes.
  • Population density is computed as population ÷ land area.
  • Overlap percentages (tracts and districts) are derived from map geometry and are approximate.

Data accuracy & methodology

ZIP pages combine 2020–2024 ACS 5-year ZCTA estimates with other public datasets when available (see Sources). Connectivity metrics use FCC coverage data, not ACS. ZIP-level estimates can have higher margins of error than county/state totals; treat small differences as statistical noise rather than precise changes.