99402 ZIP Code — Asotin, WA

Asotin County, Washington

ZIP code 99402 is located in Asotin, Washington, within Asotin County. It covers approximately 336.35 square miles and serves a population of 1,594 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 509.

About ZIP code 99402

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $320,600. Owner-occupancy is high at 89%, well above the national average.

The gap between median ($80,769) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 6% is below the national average. 41% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 24 minutes is near the national average.

Educational attainment is near the national average, with 32% of residents holding a bachelor's degree or higher.

Overall, ZIP code 99402 reflects a community defined by high homeownership and a significant Social Security-dependent population.

1,594

population

336.35

sq mi land

Standard

ZIP type

Pacific (PT)

timezone

99402 ZIP code map

Cities in ZIP code 99402

Below are the cities the US Postal Service accepts for ZIP code 99402. Using any city not on this list may result in mail delivery delays.

City	Status
Asotin	Preferred

Nearby ZIP codes

99401 Anatone (4.2 mi) 99403 Clarkston (8.4 mi) 83501 Lewiston (10.8 mi)

Demographics updated 05/2026

Population
Total population	1,594
Population density	5 / sq mi
State FIPS	53
County FIPS	003

Geography
Land area	336.35 sq mi
Water area	2.63 sq mi
Latitude	46.1716
Longitude	-117.1035
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	47.3%	47.0%	31.7%
$50k – $100k	20.9%	31.4%	30.6%
$100k – $200k	22.2%	17.6%	27.1%
Over $200k	9.6%	4.0%	10.6%

Demographics & statistics

1,594

Population

People per sq mi

53.0

Median age

$80,769

Median household income

$56,347

Per capita income

$320,600

Median home value

$938

Median monthly rent

89.3%

Home ownership

6.0%

Poverty rate

2.9%

Unemployment

754

Housing units

31.5%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

117

45–54

120

55–59

60–64

118

65–74

120

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	313	19.6%
18 and over	1,281	80.4%
65 and over	433	27.2%
Median age	53.0 years

Race & ethnicity

White 87.9%

Hispanic or Latino 4.1%

Two or more races 3.6%

Other race 2.8%

Black or African American 1.1%

Asian 0.5%

Group	Count	%
White	1,461	87.9%
Hispanic or Latino	69	4.1%
Two or more races	60	3.6%
Other race	46	2.8%
Black or African American	18	1.1%
Asian	9	0.5%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	47.3%	47.0%	31.7%
$50k – $100k	20.9%	31.4%	30.6%
$100k – $200k	22.2%	17.6%	27.1%
Over $200k	9.6%	4.0%	10.6%

Under $10k 3.2%

$15k–$25k 11.0%

$25k–$35k 7.1%

$35k–$50k 2.5%

$50k–$75k 22.2%

$75k–$100k 13.0%

$100k–$150k 13.7%

$150k–$200k 13.8%

$200k+ 13.6%

Range	% of households
Under $10k	3.2%
$15k–$25k	11.0%
$25k–$35k	7.1%
$35k–$50k	2.5%
$50k–$75k	22.2%
$75k–$100k	13.0%
$100k–$150k	13.7%
$150k–$200k	13.8%
$200k+	13.6%
Median income	$80,769

Housing

Home values

Under $50k 7.8%

$50k–$100k 1.7%

$100k–$150k 10.3%

$150k–$200k 9.8%

$200k–$300k 18.3%

$300k–$500k 23.5%

$500k–$1M 28.7%

Housing overview

Metric	Value
Median home value	$320,600
Median rent / month	$938
Owner occupied	89.3%
Renter occupied	10.7%
Vacant	12.3%
Single-family detached	77.2%
Large apartment buildings	0.0%
Mobile homes	21.0%
Median rooms	6.2
Avg household size (owned)	2.14

Year built

Era	%
2020 or later	0.0%
2010–2019	3.7%
2000–2009	22.6%
1990–1999	12.5%
1980–1989	3.0%
1970–1979	16.8%
1960–1969	5.4%
1950–1959	4.2%
1940–1949	9.1%
1939 or earlier	22.6%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	5.5%
2 bedrooms	27.3%
3 bedrooms	34.7%
4 bedrooms	20.2%
5+ bedrooms	12.3%

Vehicles per household

Vehicles	% of households
No vehicle	5.6%
1 vehicle	20.1%
2 vehicles	29.9%
3 or more	44.4%

Heating fuel

Fuel type	%
Utility gas	47.4%
Electricity	38.2%
Propane / LP gas	7.8%
Fuel oil	0.8%
Wood	5.8%

Households & families

Household type	Count	%
Married-couple family	316	43.3%
Cohabiting couple	62	8.5%
Male householder, no spouse	155	21.2%
Female householder, no spouse	197	27.0%
Households with children under 18	185	25.3%
Households with seniors (65+)	300	41.1%
Average household size	2.18

Marital status

Status	Male	Female
Never married	22.5%	28.7%
Married	53.0%	47.9%
Separated	3.3%	1.0%
Widowed	0.6%	12.8%
Divorced	20.5%	9.6%

Education

Less than 9th grade 0.8%

Some HS, no diploma 9.9%

HS graduate 25.1%

Some college, no degree 22.9%

Associate's degree 9.8%

Bachelor's degree 17.7%

Graduate / professional 13.8%

Metric	%
HS diploma or higher	89.3%
Bachelor's or higher	31.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	39	13.8%
Kindergarten	9	3.2%
Elementary school	113	40.1%
High school	88	31.2%
College / grad school	33	11.7%

Employment

Industry of employment

Education & healthcare 26.6%

Manufacturing 14.6%

Construction 9.8%

Professional & management 9.5%

Retail trade 8.7%

Finance & real estate 8.3%

Transportation & utilities 5.8%

Agriculture & mining 5.3%

Public administration 3.9%

Arts, food & hospitality 2.9%

Other services 2.8%

Information 1.7%

Occupation

Category	%
Management, business & arts	49.2%
Service	8.4%
Sales & office	24.5%
Natural resources & construction	9.4%
Production & transportation	8.4%

Employment type

Type	%
Private sector	83.0%
Government	12.2%
Self-employed	4.8%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	72.9%
Carpool	11.2%
Public transit	0.0%
Walk	2.1%
Work from home	13.9%
Other means	0.0%
Avg commute (minutes)	24.1

Poverty

All people 6.0%

Under 18 years 6.1%

18 and over 6.0%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	41.2%
Retirement income	40.4%
Supplemental Security	10.8%
Cash public assistance	1.5%
Food stamps / SNAP	7.7%

Health indicators

Condition	%
Obesity	31.2%
High blood pressure	33.0%
High cholesterol	35.1%
Diabetes	10.0%
Heart disease	6.7%
Stroke	3.1%
Asthma	11.1%
Arthritis	28.6%
Kidney disease	3.1%
Pulmonary disease	6.9%
Cancer	7.9%

Behavior / access	%
Smoking	16.4%
Binge drinking	17.4%
No physical activity	19.0%
Less than 7 hrs sleep	28.5%
Depression	26.0%
Fair or poor health	13.1%
Poor mental health	14.7%
Poor physical health	11.0%
No health insurance	8.8%
Visited doctor (checkup)	70.7%
Visited dentist	70.0%
Cholesterol screening	90.3%
Teeth loss	10.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	141	11.0%

Disability	%
Any disability	18.0%
Under 18	2.2%
18–64 years	13.1%
65 and over	39.0%

Health insurance coverage

Type	%
Private insurance	70.5%
Public insurance	45.4%
No insurance	7.6%
Uninsured under 19	5.6%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,512	94.9%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,529	95.9%
Born in same state	1,507	94.5%
Born in different state	487	30.6%
Foreign born	22	1.4%
Naturalized citizen	65	4.1%
Not a US citizen	46	70.8%

Ancestry

Ancestry	Count	%
French	241	15.1%
Italian	200	12.5%
Arab	49	3.1%

Ancestry	Count	%
English	26	1.6%
Polish	16	1%
German	14	0.9%

Technology access

Metric	% of households
Computer access	45.8%
Internet access	93.6%

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

Frequently asked questions about ZIP code 99402

What city is ZIP code 99402 in?

ZIP code 99402 is primarily assigned to Asotin, Washington.

What county is ZIP code 99402 in?

ZIP code 99402 falls within Asotin County, Washington.

Does ZIP code 99402 have an older population?

27% of residents in ZIP code 99402 are 65 or older, above the national average of ~17%.

Is ZIP code 99402 mostly owner-occupied?

89% of occupied units in ZIP code 99402 are owner-occupied, well above the national average.

Does ZIP code 99402 have a large retiree population?

41% of households in ZIP code 99402 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 99402 have a large veteran population?

11% of civilians in ZIP code 99402 are veterans, above the national average of ~7%.

What timezone is ZIP code 99402 in?

ZIP code 99402 observes the PST timezone.