99320 ZIP Code — Benton City, WA

Benton County, Washington

ZIP code 99320 is located in Benton City, Washington, within Benton County. It covers approximately 209.31 square miles and serves a population of 10,023 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 509.

About ZIP code 99320

The housing stock consists of a higher-than-average concentration of mobile homes. Most homes were built in the 1990s, giving the area an established character. Median home value is $267,500. Owner-occupancy is high at 83%, well above the national average.

Median household income is $71,154. SNAP benefit usage at 21% of households reflects economic stress in the area. 32% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is natural resources, construction, and trades, with education and healthcare as the leading industry. The average commute of 30 minutes is near the national average.

College attainment at 15% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 99320 reflects a community defined by a trades-oriented workforce, high homeownership, a significant Social Security-dependent population, and elevated reliance on food assistance.

10,023

population

209.31

sq mi land

Standard

ZIP type

Pacific (PT)

timezone

99320 ZIP code map

Cities in ZIP code 99320

Below are the cities the US Postal Service accepts for ZIP code 99320. Using any city not on this list may result in mail delivery delays.

City	Status
Benton City	Acceptable
Benton City	Preferred

Nearby ZIP codes

99353 West Richland (6.3 mi) 99354 Richland (9.3 mi) 99350 Prosser (9.7 mi) 99352 Richland (10.5 mi) 99338 Kennewick (16.6 mi) 99338 Kennewick (16.6 mi) 99336 Kennewick (16.8 mi)

Demographics updated 05/2026

Population
Total population	10,023
Population density	48 / sq mi
State FIPS	53
County FIPS	005

Geography
Land area	209.31 sq mi
Water area	1.17 sq mi
Latitude	46.3058
Longitude	-119.5070
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	31.5%	32.9%	31.7%
$50k – $100k	42.6%	33.1%	30.6%
$100k – $200k	22.8%	26.4%	27.1%
Over $200k	3.1%	7.6%	10.6%

Demographics & statistics

10,023

Population

People per sq mi

36.3

Median age

$71,154

Median household income

$31,234

Per capita income

$267,500

Median home value

$1,028

Median monthly rent

82.9%

Home ownership

11.1%

Poverty rate

4.8%

Unemployment

3,256

Housing units

14.8%

Bachelor's or higher

Age distribution

Male Female

447

Under 5

458

344

5–9

353

348

10–14

356

235

15–19

241

307

20–24

314

711

25–34

728

632

35–44

647

601

45–54

615

249

55–59

255

298

60–64

305

565

65–74

579

189

75–84

193

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	2,621	26.1%
18 and over	7,402	73.9%
65 and over	1,579	15.8%
Median age	36.3 years

Race & ethnicity

White 63.6%

Hispanic or Latino 15.2%

Two or more races 11.1%

Other race 8.2%

American Indian / Alaska Native 1.6%

Asian 0.3%

Group	Count	%
White	7,515	63.6%
Hispanic or Latino	1,790	15.2%
Two or more races	1,314	11.1%
Other race	969	8.2%
American Indian / Alaska Native	191	1.6%
Asian	34	0.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	31.5%	32.9%	31.7%
$50k – $100k	42.6%	33.1%	30.6%
$100k – $200k	22.8%	26.4%	27.1%
Over $200k	3.1%	7.6%	10.6%

Under $10k 3.1%

$10k–$15k 2.1%

$15k–$25k 8.6%

$25k–$35k 8.4%

$35k–$50k 9.6%

$50k–$75k 20.4%

$75k–$100k 15.9%

$100k–$150k 18.1%

$150k–$200k 7.6%

$200k+ 6.4%

Range	% of households
Under $10k	3.1%
$10k–$15k	2.1%
$15k–$25k	8.6%
$25k–$35k	8.4%
$35k–$50k	9.6%
$50k–$75k	20.4%
$75k–$100k	15.9%
$100k–$150k	18.1%
$150k–$200k	7.6%
$200k+	6.4%
Median income	$71,154

Housing

Home values

Under $50k 6.9%

$50k–$100k 3.7%

$100k–$150k 8.7%

$150k–$200k 9.4%

$200k–$300k 31.1%

$300k–$500k 28.3%

$500k–$1M 11.3%

$1M+ 0.5%

Housing overview

Metric	Value
Median home value	$267,500
Median rent / month	$1,028
Owner occupied	82.9%
Renter occupied	17.1%
Vacant	7.6%
Single-family detached	51.4%
Large apartment buildings	0.3%
Mobile homes	41.7%
Median rooms	5.8
Avg household size (owned)	2.83

Year built

Era	%
2020 or later	0.0%
2010–2019	9.8%
2000–2009	18.0%
1990–1999	21.9%
1980–1989	14.3%
1970–1979	20.1%
1960–1969	3.4%
1950–1959	4.5%
1940–1949	4.5%
1939 or earlier	3.6%

Bedrooms

Size	% of units
No bedroom (studio)	1.1%
1 bedroom	3.9%
2 bedrooms	17.1%
3 bedrooms	60.5%
4 bedrooms	14.6%
5+ bedrooms	2.8%

Vehicles per household

Vehicles	% of households
No vehicle	4.1%
1 vehicle	15.9%
2 vehicles	30.9%
3 or more	49.2%

Heating fuel

Fuel type	%
Utility gas	2.3%
Electricity	91.0%
Propane / LP gas	0.7%
Wood	4.1%
No fuel used	0.3%

Households & families

Household type	Count	%
Married-couple family	1,945	54.5%
Cohabiting couple	432	12.1%
Male householder, no spouse	535	15.0%
Female householder, no spouse	658	18.4%
Households with children under 18	1,219	34.1%
Households with seniors (65+)	1,170	32.8%
Average household size	2.80

Marital status

Status	Male	Female
Never married	29.4%	24.9%
Married	54.5%	51.8%
Separated	1.5%	2.9%
Widowed	2.1%	8.5%
Divorced	12.5%	11.9%

Education

Less than 9th grade 6.8%

Some HS, no diploma 4.8%

HS graduate 29.7%

Some college, no degree 29.1%

Associate's degree 14.8%

Bachelor's degree 10.8%

Graduate / professional 3.9%

Metric	%
HS diploma or higher	88.4%
Bachelor's or higher	14.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	180	8.5%
Kindergarten	29	1.4%
Elementary school	1,189	56.4%
High school	347	16.5%
College / grad school	362	17.2%

Employment

Industry of employment

Education & healthcare 15.4%

Construction 14.6%

Professional & management 12.8%

Agriculture & mining 11.7%

Manufacturing 9.0%

Transportation & utilities 8.3%

Other services 6.8%

Public administration 6.7%

Retail trade 6.5%

Arts, food & hospitality 3.7%

Wholesale trade 1.7%

Finance & real estate 1.7%

Information 1.1%

Occupation

Category	%
Management, business & arts	24.9%
Service	18.8%
Sales & office	16.1%
Natural resources & construction	26.0%
Production & transportation	14.2%

Employment type

Type	%
Private sector	76.9%
Government	16.6%
Self-employed	6.5%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	74.3%
Carpool	17.7%
Public transit	0.0%
Walk	0.4%
Work from home	7.2%
Other means	0.3%
Avg commute (minutes)	30.4

Poverty

All people 11.1%

Under 18 years 14.8%

18 and over 9.9%

Married-couple families 2.6%

Female-led households 19.3%

Income support

Source	% of households
Social Security	31.8%
Retirement income	27.4%
Supplemental Security	3.6%
Cash public assistance	2.5%
Food stamps / SNAP	21.2%

Health indicators

Condition	%
Obesity	34.9%
High blood pressure	30.7%
High cholesterol	34.0%
Diabetes	9.4%
Heart disease	6.0%
Stroke	2.9%
Asthma	11.3%
Arthritis	25.3%
Kidney disease	2.8%
Pulmonary disease	6.7%
Cancer	6.4%

Behavior / access	%
Smoking	17.0%
Binge drinking	16.8%
No physical activity	20.4%
Less than 7 hrs sleep	31.0%
Depression	27.9%
Fair or poor health	15.1%
Poor mental health	15.9%
Poor physical health	11.6%
No health insurance	13.2%
Visited doctor (checkup)	70.7%
Visited dentist	64.3%
Cholesterol screening	87.4%
Teeth loss	12.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	813	11.0%

Disability	%
Any disability	17.0%
Under 18	4.7%
18–64 years	15.8%
65 and over	41.6%

Health insurance coverage

Type	%
Private insurance	59.6%
Public insurance	45.2%
No insurance	11.7%
Uninsured under 19	1.5%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	9,118	91.0%
Spanish	888	9.7%
Other Indo-European	864	9.5%
Asian & Pacific Islander	21	0.2%
Other languages	3	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	8,902	88.8%
Born in same state	8,742	87.2%
Born in different state	5,771	57.6%
Foreign born	160	1.6%
Naturalized citizen	1,121	11.2%
Not a US citizen	294	26.2%

Ancestry

Ancestry	Count	%
French	1,706	17%
Italian	1,083	10.8%
Arab	486	4.8%
English	397	4%

Ancestry	Count	%
Polish	275	2.7%
Dutch	75	0.7%
German	18	0.2%

Technology access

Metric	% of households
Computer access	35.6%
Internet access	95.5%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 99320

What city is ZIP code 99320 in?

ZIP code 99320 is primarily assigned to Benton City, Washington.

What county is ZIP code 99320 in?

ZIP code 99320 falls within Benton County, Washington.

How educated is the population of ZIP code 99320?

15% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

Is ZIP code 99320 mostly owner-occupied?

83% of occupied units in ZIP code 99320 are owner-occupied, well above the national average.

Does ZIP code 99320 have a large veteran population?

11% of civilians in ZIP code 99320 are veterans, above the national average of ~7%.

What is the population of ZIP code 99320?

ZIP code 99320 has an estimated population of 10,023 residents, with a density of 48 people per square mile.

What timezone is ZIP code 99320 in?

ZIP code 99320 observes the PST timezone.