99350 ZIP Code — Prosser, WA
Benton County, Washington
ZIP code 99350 is located in Prosser, Washington, within Benton County. It covers approximately 600.07 square miles and serves a population of 14,287 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 509.
About ZIP code 99350
The housing stock consists of a higher-than-average concentration of mobile homes. Most homes were built in the 1980s, giving the area an established character. Median home value is $278,500. Owner-occupancy sits near the national average at 63%.
Median household income is $70,164. 35% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is management, business, and professional, with agriculture and mining as the leading industry. The average commute of 21 minutes is near the national average.
Educational attainment is near the national average, with 21% of residents holding a bachelor's degree or higher.
14,287
population
600.07
sq mi land
Standard
ZIP type
Pacific (PT)
timezone
99350 ZIP code map
Cities in ZIP code 99350
Below are the cities the US Postal Service accepts for ZIP code 99350. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Prosser | Acceptable |
| Prosser | Preferred |
Nearby ZIP codes
99320 Benton City (9.7 mi)
98930 Grandview (12 mi)
99353 West Richland (15.7 mi)
99338 Kennewick (17.9 mi)
99338 Kennewick (17.9 mi)
99352 Richland (18.1 mi)
99354 Richland (19.1 mi)
98944 Sunnyside (19.3 mi)
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 14,287 |
| Population density | 24 / sq mi |
| State FIPS | 53 |
| County FIPS | 005 |
| Geography | |
|---|---|
| Land area | 600.07 sq mi |
| Water area | 1.69 sq mi |
| Latitude | 46.2332 |
| Longitude | -119.6811 |
| Timezone | Pacific (PT) |
| Area code | 509 |
Total population by age
Gender
Race & ethnicity
Economics
updated 05/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 39.2% | 32.9% | 31.7% |
| $50k – $100k | 38.1% | 33.1% | 30.6% |
| $100k – $200k | 19.8% | 26.4% | 27.1% |
| Over $200k | 2.9% | 7.6% | 10.6% |
Demographics & statistics
14,287
Population
24
People per sq mi
34.6
Median age
$70,164
Median household income
$29,898
Per capita income
$278,500
Median home value
$932
Median monthly rent
63.0%
Home ownership
10.9%
Poverty rate
7.3%
Unemployment
3,284
Housing units
21.3%
Bachelor's or higher
Age distribution
Male
Female
385
Under 5
369
781
5–9
750
752
10–14
721
379
15–19
363
587
20–24
564
831
25–34
798
845
35–44
810
926
45–54
889
322
55–59
309
365
60–64
350
658
65–74
631
339
75–84
326
121
85+
116
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 4,301 | 30.1% |
| 18 and over | 9,986 | 69.9% |
| 65 and over | 2,191 | 15.3% |
| Median age | 34.6 years | |
Race & ethnicity
White
49.9%
Hispanic or Latino
23.3%
Other race
15.2%
Two or more races
8.1%
Asian
1.8%
American Indian / Alaska Native
1.1%
Black or African American
0.5%
Native Hawaiian / Pacific Islander
0.1%
| Group | Count | % |
|---|---|---|
| White | 9,296 | 49.9% |
| Hispanic or Latino | 4,330 | 23.3% |
| Other race | 2,829 | 15.2% |
| Two or more races | 1,501 | 8.1% |
| Asian | 341 | 1.8% |
| American Indian / Alaska Native | 212 | 1.1% |
| Black or African American | 96 | 0.5% |
| Native Hawaiian / Pacific Islander | 12 | 0.1% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 39.2% | 32.9% | 31.7% |
| $50k – $100k | 38.1% | 33.1% | 30.6% |
| $100k – $200k | 19.8% | 26.4% | 27.1% |
| Over $200k | 2.9% | 7.6% | 10.6% |
Under $10k
3.5%
$10k–$15k
3.0%
$15k–$25k
6.5%
$25k–$35k
10.8%
$35k–$50k
8.2%
$50k–$75k
20.0%
$75k–$100k
11.0%
$100k–$150k
23.4%
$150k–$200k
9.1%
$200k+
4.4%
| Range | % of households |
|---|---|
| Under $10k | 3.5% |
| $10k–$15k | 3.0% |
| $15k–$25k | 6.5% |
| $25k–$35k | 10.8% |
| $35k–$50k | 8.2% |
| $50k–$75k | 20.0% |
| $75k–$100k | 11.0% |
| $100k–$150k | 23.4% |
| $150k–$200k | 9.1% |
| $200k+ | 4.4% |
| Median income | $70,164 |
Housing
Home values
Under $50k
7.4%
$50k–$100k
1.7%
$100k–$150k
4.0%
$150k–$200k
7.7%
$200k–$300k
36.3%
$300k–$500k
30.0%
$500k–$1M
9.4%
$1M+
3.5%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $278,500 |
| Median rent / month | $932 |
| Owner occupied | 63.0% |
| Renter occupied | 37.0% |
| Vacant | 5.5% |
| Single-family detached | 66.9% |
| Large apartment buildings | 7.4% |
| Mobile homes | 17.0% |
| Median rooms | 5.5 |
| Avg household size (owned) | 2.89 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.4% |
| 2010–2019 | 9.4% |
| 2000–2009 | 12.7% |
| 1990–1999 | 15.7% |
| 1980–1989 | 18.6% |
| 1970–1979 | 7.7% |
| 1960–1969 | 6.5% |
| 1950–1959 | 11.0% |
| 1940–1949 | 8.1% |
| 1939 or earlier | 10.1% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 2.3% |
| 1 bedroom | 8.8% |
| 2 bedrooms | 24.8% |
| 3 bedrooms | 43.9% |
| 4 bedrooms | 17.5% |
| 5+ bedrooms | 2.7% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 6.1% |
| 1 vehicle | 22.7% |
| 2 vehicles | 33.8% |
| 3 or more | 37.4% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 6.4% |
| Electricity | 86.0% |
| Propane / LP gas | 3.9% |
| Fuel oil | 0.8% |
| Wood | 2.3% |
| No fuel used | 0.6% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 2,884 | 60.4% |
| Cohabiting couple | 399 | 8.4% |
| Male householder, no spouse | 523 | 11.0% |
| Female householder, no spouse | 965 | 20.2% |
| Households with children under 18 | 1,990 | 41.7% |
| Households with seniors (65+) | 1,636 | 34.3% |
| Average household size | 2.95 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 29.6% | 25.7% |
| Married | 56.7% | 53.5% |
| Separated | 1.3% | 2.5% |
| Widowed | 2.3% | 10.0% |
| Divorced | 10.1% | 8.2% |
Education
Less than 9th grade
13.8%
Some HS, no diploma
7.9%
HS graduate
28.9%
Some college, no degree
17.9%
Associate's degree
10.3%
Bachelor's degree
13.7%
Graduate / professional
7.6%
| Metric | % |
|---|---|
| HS diploma or higher | 78.3% |
| Bachelor's or higher | 21.3% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 199 | 5.0% |
| Kindergarten | 293 | 7.3% |
| Elementary school | 2,270 | 56.9% |
| High school | 738 | 18.5% |
| College / grad school | 489 | 12.3% |
Employment
Industry of employment
Agriculture & mining
21.9%
Education & healthcare
21.9%
Arts, food & hospitality
10.7%
Retail trade
8.3%
Manufacturing
7.1%
Professional & management
6.5%
Construction
6.2%
Public administration
4.8%
Other services
3.7%
Wholesale trade
2.8%
Transportation & utilities
2.4%
Finance & real estate
2.3%
Information
1.2%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 30.5% |
| Service | 20.6% |
| Sales & office | 13.6% |
| Natural resources & construction | 22.8% |
| Production & transportation | 12.6% |
Employment type
| Type | % |
|---|---|
| Private sector | 73.1% |
| Government | 19.6% |
| Self-employed | 6.6% |
| Unpaid family workers | 0.7% |
Commute
| Method | % |
|---|---|
| Drive alone | 74.7% |
| Carpool | 13.4% |
| Public transit | 1.3% |
| Walk | 1.6% |
| Work from home | 7.6% |
| Other means | 1.4% |
| Avg commute (minutes) | 21.1 |
Poverty
All people
10.9%
Under 18 years
11.7%
18 and over
10.5%
Married-couple families
6.6%
Female-led households
26.3%
Income support
| Source | % of households |
|---|---|
| Social Security | 34.7% |
| Retirement income | 24.2% |
| Supplemental Security | 3.8% |
| Cash public assistance | 4.8% |
| Food stamps / SNAP | 10.3% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 35.8% |
| High blood pressure | 30.3% |
| High cholesterol | 31.6% |
| Diabetes | 10.2% |
| Heart disease | 6.2% |
| Stroke | 3.0% |
| Asthma | 11.0% |
| Arthritis | 24.3% |
| Kidney disease | 3.0% |
| Pulmonary disease | 6.7% |
| Cancer | 6.1% |
| Behavior / access | % |
|---|---|
| Smoking | 16.7% |
| Binge drinking | 15.9% |
| No physical activity | 23.9% |
| Less than 7 hrs sleep | 31.1% |
| Depression | 26.7% |
| Fair or poor health | 17.6% |
| Poor mental health | 16.0% |
| Poor physical health | 12.2% |
| No health insurance | 19.2% |
| Visited doctor (checkup) | 69.9% |
| Visited dentist | 59.8% |
| Cholesterol screening | 85.6% |
| Teeth loss | 15.2% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 706 | 7.1% |
| Disability | % |
|---|---|
| Any disability | 8.7% |
| Under 18 | 1.7% |
| 18–64 years | 5.1% |
| 65 and over | 35.5% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 60.6% |
| Public insurance | 38.0% |
| No insurance | 12.5% |
| Uninsured under 19 | 0.3% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 13,533 | 94.7% |
| Spanish | 2,031 | 15.0% |
| Other Indo-European | 1,985 | 14.7% |
| Asian & Pacific Islander | 10 | 0.1% |
| Other languages | 36 | 0.3% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 11,585 | 81.1% |
| Born in same state | 11,225 | 78.6% |
| Born in different state | 7,885 | 55.2% |
| Foreign born | 360 | 2.5% |
| Naturalized citizen | 2,702 | 18.9% |
| Not a US citizen | 626 | 23.2% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| French | 1,710 | 12% |
| Italian | 903 | 6.3% |
| Arab | 400 | 2.8% |
| English | 396 | 2.8% |
| Ancestry | Count | % |
|---|---|---|
| Polish | 155 | 1.1% |
| German | 144 | 1% |
| Dutch | 68 | 0.5% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 33.4% |
| Internet access | 90.6% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 99350
What city is ZIP code 99350 in?
ZIP code 99350 is primarily assigned to Prosser, Washington.
What county is ZIP code 99350 in?
ZIP code 99350 falls within Benton County, Washington.
Is ZIP code 99350 family-oriented?
30% of residents in ZIP code 99350 are under 18, reflecting a younger, family-oriented community.
What is the population of ZIP code 99350?
ZIP code 99350 has an estimated population of 14,287 residents, with a density of 24 people per square mile.
What is the typical home value in ZIP code 99350?
The median home value in ZIP code 99350 is $278,500.
What is the median household income in ZIP code 99350?
The median household income in ZIP code 99350 is $70,164, below the national median of ~$75,000.
What timezone is ZIP code 99350 in?
ZIP code 99350 observes the PST timezone.